257222135437765 has 16 divisors (see below), whose sum is σ = 308696031564480. Its totient is φ = 205758063388800.

The previous prime is 257222135437717. The next prime is 257222135437781. The reversal of 257222135437765 is 567734531222752.

It is not a de Polignac number, because 257222135437765 - 2²³ = 257222127049157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3240390846 + ... + 3240470224.

It is an arithmetic number, because the mean of its divisors is an integer number (19293501972780).

Almost surely, 2^{257222135437765} is an apocalyptic number.

It is an amenable number.

257222135437765 is a deficient number, since it is larger than the sum of its proper divisors (51473896126715).

257222135437765 is a wasteful number, since it uses less digits than its factorization.

257222135437765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133092.

The product of its digits is 148176000, while the sum is 61.

The spelling of 257222135437765 in words is "two hundred fifty-seven trillion, two hundred twenty-two billion, one hundred thirty-five million, four hundred thirty-seven thousand, seven hundred sixty-five".