55977619992 has 96 divisors (see below), whose sum is σ = 172368123120. Its totient is φ = 15052800000.

The previous prime is 55977619991. The next prime is 55977620003. The reversal of 55977619992 is 29991677955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55977619991) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1380009 + ... + 1419992.

Almost surely, 2^55977619992 is an apocalyptic number.

It is an amenable number.

55977619992 is an abundant number, since it is smaller than the sum of its proper divisors (116390503128).

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

55977619992 is a wasteful number, since it uses less digits than its factorization.

55977619992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800041 (or 2800030 counting only the distinct ones).

The product of its digits is 96446700, while the sum is 69.

The spelling of 55977619992 in words is "fifty-five billion, nine hundred seventy-seven million, six hundred nineteen thousand, nine hundred ninety-two".