55716397992 has 256 divisors, whose sum is σ = 165970944000. Its totient is φ = 17257549824.

The previous prime is 55716397969. The next prime is 55716397999. The reversal of 55716397992 is 29979361755.

55716397992 is a `hidden beast` number, since 557 + 1 + 6 + 3 + 9 + 79 + 9 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (55716397999) 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 63 ways as a sum of consecutive naturals, for example, 145473433 + ... + 145473815.

It is an arithmetic number, because the mean of its divisors is an integer number (648324000).

Almost surely, 2^55716397992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55716397992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82985472000).

55716397992 is an abundant number, since it is smaller than the sum of its proper divisors (110254546008).

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

55716397992 is a wasteful number, since it uses less digits than its factorization.

55716397992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 807 counting only the distinct ones).

The product of its digits is 32148900, while the sum is 63.

The spelling of 55716397992 in words is "fifty-five billion, seven hundred sixteen million, three hundred ninety-seven thousand, nine hundred ninety-two".