53015502640 has 80 divisors (see below), whose sum is σ = 126835382016. Its totient is φ = 20595916800.

The previous prime is 53015502637. The next prime is 53015502641. The reversal of 53015502640 is 4620551035.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (53015502641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695200 + ... + 767680.

Almost surely, 2^53015502640 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 53015502640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63417691008).

53015502640 is an abundant number, since it is smaller than the sum of its proper divisors (73819879376).

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

53015502640 is a wasteful number, since it uses less digits than its factorization.

53015502640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72758 (or 72752 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 53015502640 in words is "fifty-three billion, fifteen million, five hundred two thousand, six hundred forty".