55287997956 has 45 divisors (see below), whose sum is σ = 144544812951. Its totient is φ = 18427921848.

The previous prime is 55287997903. The next prime is 55287997957. The reversal of 55287997956 is 65979978255.

The square root of 55287997956 is 235134.

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

55287997956 is a `hidden beast` number, since 5 + 528 + 7 + 9 + 9 + 7 + 95 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (55287997957) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4225881 + ... + 4238943.

Almost surely, 2^55287997956 is an apocalyptic number.

55287997956 is the 235134-th square number.

It is an amenable number.

55287997956 is an abundant number, since it is smaller than the sum of its proper divisors (89256814995).

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

55287997956 is an frugal number, since it uses more digits than its factorization.

55287997956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26142 (or 13068 counting only the distinct ones).

The product of its digits is 428652000, while the sum is 72.

The spelling of 55287997956 in words is "fifty-five billion, two hundred eighty-seven million, nine hundred ninety-seven thousand, nine hundred fifty-six".