55287232560 has 320 divisors, whose sum is σ = 227102607360. Its totient is φ = 12087567360.

The previous prime is 55287232529. The next prime is 55287232577. The reversal of 55287232560 is 6523278255.

55287232560 is a `hidden beast` number, since 5 + 5 + 2 + 87 + 2 + 3 + 2 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 268270 + ... + 427250.

It is an arithmetic number, because the mean of its divisors is an integer number (709695648).

Almost surely, 2^55287232560 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 55287232560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113551303680).

55287232560 is an abundant number, since it is smaller than the sum of its proper divisors (171815374800).

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

55287232560 is a wasteful number, since it uses less digits than its factorization.

55287232560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159033 (or 159021 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 45.

The spelling of 55287232560 in words is "fifty-five billion, two hundred eighty-seven million, two hundred thirty-two thousand, five hundred sixty".