55491378495504 has 80 divisors (see below), whose sum is σ = 164875202990208. Its totient is φ = 15753694334976.

The previous prime is 55491378495503. The next prime is 55491378495521. The reversal of 55491378495504 is 40559487319455.

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55491378495503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525911937 + ... + 526017440.

Almost surely, 2^{55491378495504} is an apocalyptic number.

It is an amenable number.

55491378495504 is an abundant number, since it is smaller than the sum of its proper divisors (109383824494704).

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

55491378495504 is a wasteful number, since it uses less digits than its factorization.

55491378495504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051929552 (or 1051929546 counting only the distinct ones).

The product of its (nonzero) digits is 544320000, while the sum is 69.

The spelling of 55491378495504 in words is "fifty-five trillion, four hundred ninety-one billion, three hundred seventy-eight million, four hundred ninety-five thousand, five hundred four".