239177057681 has 2 divisors, whose sum is σ = 239177057682. Its totient is φ = 239177057680.

The previous prime is 239177057671. The next prime is 239177057683. The reversal of 239177057681 is 186750771932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201407078656 + 37769979025 = 448784^2 + 194345^2 .

It is a cyclic number.

It is not a de Polignac number, because 239177057681 - 2²⁶ = 239109948817 is a prime.

It is a super-2 number, since 2×239177057681² (a number of 24 digits) contains 22 as substring.

Together with 239177057683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (239177057683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119588528840 + 119588528841.

It is an arithmetic number, because the mean of its divisors is an integer number (119588528841).

Almost surely, 2^239177057681 is an apocalyptic number.

It is an amenable number.

239177057681 is a deficient number, since it is larger than the sum of its proper divisors (1).

239177057681 is an equidigital number, since it uses as much as digits as its factorization.

239177057681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4445280, while the sum is 56.

The spelling of 239177057681 in words is "two hundred thirty-nine billion, one hundred seventy-seven million, fifty-seven thousand, six hundred eighty-one".