257465655 has 16 divisors (see below), whose sum is σ = 457716960. Its totient is φ = 137314944.

The previous prime is 257465651. The next prime is 257465717. The reversal of 257465655 is 556564752.

It is not a de Polignac number, because 257465655 - 2² = 257465651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 257465655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257465651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953442 + ... + 953711.

It is an arithmetic number, because the mean of its divisors is an integer number (28607310).

Almost surely, 2^257465655 is an apocalyptic number.

257465655 is a deficient number, since it is larger than the sum of its proper divisors (200251305).

257465655 is a wasteful number, since it uses less digits than its factorization.

257465655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907167 (or 1907161 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The square root of 257465655 is about 16045.7363495727. The cubic root of 257465655 is about 636.1698771916.

The spelling of 257465655 in words is "two hundred fifty-seven million, four hundred sixty-five thousand, six hundred fifty-five".