55881787153855 has 16 divisors (see below), whose sum is σ = 72216623999520. Its totient is φ = 41266458741888.

The previous prime is 55881787153831. The next prime is 55881787153873. The reversal of 55881787153855 is 55835178718855.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55881787153855 - 2¹⁵ = 55881787121087 is a prime.

It is a super-2 number, since 2×55881787153855² (a number of 28 digits) contains 22 as substring.

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, 46419736 + ... + 47608354.

It is an arithmetic number, because the mean of its divisors is an integer number (4513538999970).

Almost surely, 2^{55881787153855} is an apocalyptic number.

55881787153855 is a deficient number, since it is larger than the sum of its proper divisors (16334836845665).

55881787153855 is a wasteful number, since it uses less digits than its factorization.

55881787153855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911930.

The product of its digits is 1881600000, while the sum is 76.

The spelling of 55881787153855 in words is "fifty-five trillion, eight hundred eighty-one billion, seven hundred eighty-seven million, one hundred fifty-three thousand, eight hundred fifty-five".