53187563520 has 1248 divisors, whose sum is σ = 238448528640. Its totient is φ = 11147673600.

The previous prime is 53187563501. The next prime is 53187563537. The reversal of 53187563520 is 2536578135.

53187563520 is a `hidden beast` number, since 5 + 3 + 1 + 8 + 7 + 5 + 635 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1248).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 352235445 + ... + 352235595.

Almost surely, 2^53187563520 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 53187563520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119224264320).

53187563520 is an abundant number, since it is smaller than the sum of its proper divisors (185260965120).

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

53187563520 is a wasteful number, since it uses less digits than its factorization.

53187563520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 53187563520 in words is "fifty-three billion, one hundred eighty-seven million, five hundred sixty-three thousand, five hundred twenty".