55981794372 has 48 divisors (see below), whose sum is σ = 149297188992. Its totient is φ = 15993469440.

The previous prime is 55981794361. The next prime is 55981794431. The reversal of 55981794372 is 27349718955.

It is a happy number.

It is a super-2 number, since 2×55981794372² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1466358 + ... + 1504050.

It is an arithmetic number, because the mean of its divisors is an integer number (3110358104).

Almost surely, 2^55981794372 is an apocalyptic number.

It is an amenable number.

55981794372 is an abundant number, since it is smaller than the sum of its proper divisors (93315394620).

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

55981794372 is a wasteful number, since it uses less digits than its factorization.

55981794372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55388 (or 55386 counting only the distinct ones).

The product of its digits is 19051200, while the sum is 60.

The spelling of 55981794372 in words is "fifty-five billion, nine hundred eighty-one million, seven hundred ninety-four thousand, three hundred seventy-two".