257515052055 has 16 divisors (see below), whose sum is σ = 412150124544. Its totient is φ = 137299347360.

The previous prime is 257515052023. The next prime is 257515052059. The reversal of 257515052055 is 550250515752.

It is a happy number.

It is not a de Polignac number, because 257515052055 - 2⁵ = 257515052023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257515051998 and 257515052016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257515052059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2575159 + ... + 2673288.

It is an arithmetic number, because the mean of its divisors is an integer number (25759382784).

Almost surely, 2^257515052055 is an apocalyptic number.

257515052055 is a deficient number, since it is larger than the sum of its proper divisors (154635072489).

257515052055 is a wasteful number, since it uses less digits than its factorization.

257515052055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251726.

The product of its (nonzero) digits is 437500, while the sum is 42.

The spelling of 257515052055 in words is "two hundred fifty-seven billion, five hundred fifteen million, fifty-two thousand, fifty-five".