53531806368 has 96 divisors (see below), whose sum is σ = 144861393600. Its totient is φ = 17301067776.

The previous prime is 53531806319. The next prime is 53531806373. The reversal of 53531806368 is 86360813535.

53531806368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348738 + ... + 478206.

It is an arithmetic number, because the mean of its divisors is an integer number (1508972850).

Almost surely, 2^53531806368 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 53531806368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72430696800).

53531806368 is an abundant number, since it is smaller than the sum of its proper divisors (91329587232).

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

53531806368 is a wasteful number, since it uses less digits than its factorization.

53531806368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129614 (or 129606 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 53531806368 in words is "fifty-three billion, five hundred thirty-one million, eight hundred six thousand, three hundred sixty-eight".