190734863281 has 4 divisors (see below), whose sum is σ = 191201208100. Its totient is φ = 190268518464.

The previous prime is 190734863273. The next prime is 190734863299. The reversal of 190734863281 is 182368437091.

190734863281 is nontrivially palindromic in base 5.

190734863281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157894174881 + 32840688400 = 397359^2 + 181220^2 .

It is a cyclic number.

It is not a de Polignac number, because 190734863281 - 2³ = 190734863273 is a prime.

It is a super-2 number, since 2×190734863281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

190734863281 is a nontrivial repdigit in base 5.

It is a plaindrome in base 5.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (190734863981) by changing a digit.

It is a nontrivial repunit in base 5.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233171796 + ... + 233172613.

It is an arithmetic number, because the mean of its divisors is an integer number (47800302025).

Almost surely, 2^190734863281 is an apocalyptic number.

190734863281 is the 195313-rd centered decagonal number.

It is an amenable number.

190734863281 is a deficient number, since it is larger than the sum of its proper divisors (466344819).

190734863281 is an equidigital number, since it uses as much as digits as its factorization.

190734863281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466344818.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 190734863281 in words is "one hundred ninety billion, seven hundred thirty-four million, eight hundred sixty-three thousand, two hundred eighty-one".