190630304881 has 4 divisors (see below), whose sum is σ = 197203763700. Its totient is φ = 184056846064.

The previous prime is 190630304873. The next prime is 190630304897. The reversal of 190630304881 is 188403036091.

190630304881 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, and also an emirpimes, since its reverse is a distinct semiprime: 188403036091 = 137 ⋅1375204643.

It can be written as a sum of positive squares in 2 ways, for example, as 106419488400 + 84210816481 = 326220^2 + 290191^2 .

It is a cyclic number.

It is not a de Polignac number, because 190630304881 - 2³ = 190630304873 is a prime.

It is a super-2 number, since 2×190630304881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190630304981) by changing a digit.

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, 3286729366 + ... + 3286729423.

It is an arithmetic number, because the mean of its divisors is an integer number (49300940925).

Almost surely, 2^190630304881 is an apocalyptic number.

It is an amenable number.

190630304881 is a deficient number, since it is larger than the sum of its proper divisors (6573458819).

190630304881 is an equidigital number, since it uses as much as digits as its factorization.

190630304881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6573458818.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 190630304881 in words is "one hundred ninety billion, six hundred thirty million, three hundred four thousand, eight hundred eighty-one".