255655571507 has 12 divisors (see below), whose sum is σ = 299219776776. Its totient is φ = 217788963840.

The previous prime is 255655571503. The next prime is 255655571539. The reversal of 255655571507 is 705175556552.

It is not a de Polignac number, because 255655571507 - 2² = 255655571503 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (255655571503) 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 11 ways as a sum of consecutive naturals, for example, 15996494 + ... + 16012467.

It is an arithmetic number, because the mean of its divisors is an integer number (24934981398).

Almost surely, 2^255655571507 is an apocalyptic number.

255655571507 is a deficient number, since it is larger than the sum of its proper divisors (43564205269).

255655571507 is a wasteful number, since it uses less digits than its factorization.

255655571507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32009138 (or 32009131 counting only the distinct ones).

The product of its (nonzero) digits is 9187500, while the sum is 53.

The spelling of 255655571507 in words is "two hundred fifty-five billion, six hundred fifty-five million, five hundred seventy-one thousand, five hundred seven".