190742147261 has 4 divisors (see below), whose sum is σ = 190747476252. Its totient is φ = 190736818272.

The previous prime is 190742147231. The next prime is 190742147311. The reversal of 190742147261 is 162741247091.

190742147261 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: 162741247091 = 1987 ⋅81902993.

It can be written as a sum of positive squares in 2 ways, for example, as 93395027236 + 97347120025 = 305606^2 + 312005^2 .

It is a cyclic number.

It is not a de Polignac number, because 190742147261 - 2¹⁴ = 190742130877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190742147231) 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, 2610440 + ... + 2682513.

It is an arithmetic number, because the mean of its divisors is an integer number (47686869063).

Almost surely, 2^190742147261 is an apocalyptic number.

It is an amenable number.

190742147261 is a deficient number, since it is larger than the sum of its proper divisors (5328991).

190742147261 is an equidigital number, since it uses as much as digits as its factorization.

190742147261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328990.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 190742147261 in words is "one hundred ninety billion, seven hundred forty-two million, one hundred forty-seven thousand, two hundred sixty-one".