55256664155 has 128 divisors (see below), whose sum is σ = 85847040000. Its totient is φ = 33158062080.

The previous prime is 55256664137. The next prime is 55256664163. The reversal of 55256664155 is 55146665255.

It is not a de Polignac number, because 55256664155 - 2⁶ = 55256664091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 370850021 + ... + 370850169.

It is an arithmetic number, because the mean of its divisors is an integer number (670680000).

Almost surely, 2^55256664155 is an apocalyptic number.

55256664155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55256664155 is a deficient number, since it is larger than the sum of its proper divisors (30590375845).

55256664155 is a wasteful number, since it uses less digits than its factorization.

55256664155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its digits is 5400000, while the sum is 50.

The spelling of 55256664155 in words is "fifty-five billion, two hundred fifty-six million, six hundred sixty-four thousand, one hundred fifty-five".