255640055 has 16 divisors (see below), whose sum is σ = 349208064. Its totient is φ = 177835680.

The previous prime is 255640039. The next prime is 255640069. The reversal of 255640055 is 550046552.

It is not a de Polignac number, because 255640055 - 2⁴ = 255640039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99779 + ... + 102308.

It is an arithmetic number, because the mean of its divisors is an integer number (21825504).

Almost surely, 2^255640055 is an apocalyptic number.

255640055 is a deficient number, since it is larger than the sum of its proper divisors (93568009).

255640055 is a wasteful number, since it uses less digits than its factorization.

255640055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202126.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 255640055 is about 15988.7477620982. The cubic root of 255640055 is about 634.6626889784.

The spelling of 255640055 in words is "two hundred fifty-five million, six hundred forty thousand, fifty-five".