55815991364 has 24 divisors (see below), whose sum is σ = 117507351360. Its totient is φ = 22662131616.

The previous prime is 55815991303. The next prime is 55815991367. The reversal of 55815991364 is 46319951855.

55815991364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×55815991364³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (55815991367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52458107 + ... + 52459170.

It is an arithmetic number, because the mean of its divisors is an integer number (4896139640).

Almost surely, 2^55815991364 is an apocalyptic number.

It is an amenable number.

55815991364 is an abundant number, since it is smaller than the sum of its proper divisors (61691359996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55815991364 is a wasteful number, since it uses less digits than its factorization.

55815991364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104917307 (or 104917305 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 56.

The spelling of 55815991364 in words is "fifty-five billion, eight hundred fifteen million, nine hundred ninety-one thousand, three hundred sixty-four".