53991567360 has 624 divisors, whose sum is σ = 204651807360. Its totient is φ = 13616087040.

The previous prime is 53991567359. The next prime is 53991567397. The reversal of 53991567360 is 6376519935.

53991567360 is a `hidden beast` number, since 539 + 9 + 15 + 67 + 36 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 53991567297 and 53991567306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94555875 + ... + 94556445.

It is an arithmetic number, because the mean of its divisors is an integer number (327967640).

Almost surely, 2^53991567360 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 53991567360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102325903680).

53991567360 is an abundant number, since it is smaller than the sum of its proper divisors (150660240000).

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

53991567360 is an equidigital number, since it uses as much as digits as its factorization.

53991567360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 4592700, while the sum is 54.

The spelling of 53991567360 in words is "fifty-three billion, nine hundred ninety-one million, five hundred sixty-seven thousand, three hundred sixty".