55987131456 has 63 divisors (see below), whose sum is σ = 160493282391. Its totient is φ = 18660484224.

The previous prime is 55987131427. The next prime is 55987131457. The reversal of 55987131456 is 65413178955.

The square root of 55987131456 is 236616.

It is a perfect power (a square), and thus also a powerful number.

55987131456 is a `hidden beast` number, since 5 + 5 + 98 + 71 + 31 + 456 = 666.

It is not an unprimeable number, because it can be changed into a prime (55987131457) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5673855 + ... + 5683713.

Almost surely, 2^55987131456 is an apocalyptic number.

55987131456 is the 236616-th square number.

It is an amenable number.

55987131456 is an abundant number, since it is smaller than the sum of its proper divisors (104506150935).

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

55987131456 is an frugal number, since it uses more digits than its factorization.

55987131456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19736 (or 9864 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The spelling of 55987131456 in words is "fifty-five billion, nine hundred eighty-seven million, one hundred thirty-one thousand, four hundred fifty-six".