53506087640 has 128 divisors (see below), whose sum is σ = 128398478400. Its totient is φ = 19997491200.

The previous prime is 53506087639. The next prime is 53506087709. The reversal of 53506087640 is 4678060535.

53506087640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 53506087591 and 53506087600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86439251 + ... + 86439869.

Almost surely, 2^53506087640 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 53506087640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64199239200).

53506087640 is an abundant number, since it is smaller than the sum of its proper divisors (74892390760).

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

53506087640 is a wasteful number, since it uses less digits than its factorization.

53506087640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 53506087640 in words is "fifty-three billion, five hundred six million, eighty-seven thousand, six hundred forty".