257136770297 has 4 divisors (see below), whose sum is σ = 280512840336. Its totient is φ = 233760700260.

The previous prime is 257136770287. The next prime is 257136770299. The reversal of 257136770297 is 792077631752.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 257136770297 - 2²⁰ = 257135721721 is a prime.

It is a super-2 number, since 2×257136770297² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257136770299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11688035003 + ... + 11688035024.

It is an arithmetic number, because the mean of its divisors is an integer number (70128210084).

Almost surely, 2^257136770297 is an apocalyptic number.

It is an amenable number.

257136770297 is a deficient number, since it is larger than the sum of its proper divisors (23376070039).

257136770297 is a wasteful number, since it uses less digits than its factorization.

257136770297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23376070038.

The product of its (nonzero) digits is 7779240, while the sum is 56.

The spelling of 257136770297 in words is "two hundred fifty-seven billion, one hundred thirty-six million, seven hundred seventy thousand, two hundred ninety-seven".