55491078836 has 12 divisors (see below), whose sum is σ = 102821705028. Its totient is φ = 26113448832.

The previous prime is 55491078829. The next prime is 55491078857. The reversal of 55491078836 is 63887019455.

It can be written as a sum of positive squares in 2 ways, for example, as 23518062736 + 31973016100 = 153356^2 + 178810^2 .

It is a super-2 number, since 2×55491078836² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 408022571 + ... + 408022706.

It is an arithmetic number, because the mean of its divisors is an integer number (8568475419).

Almost surely, 2^55491078836 is an apocalyptic number.

It is an amenable number.

55491078836 is a deficient number, since it is larger than the sum of its proper divisors (47330626192).

55491078836 is a wasteful number, since it uses less digits than its factorization.

55491078836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816045298 (or 816045296 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 55491078836 in words is "fifty-five billion, four hundred ninety-one million, seventy-eight thousand, eight hundred thirty-six".