53891799920640 has 624 divisors, whose sum is σ = 212644472451840. Its totient is φ = 12496638443520.

The previous prime is 53891799920627. The next prime is 53891799920653. The reversal of 53891799920640 is 4602999719835.

53891799920640 is a `hidden beast` number, since 5 + 389 + 17 + 99 + 92 + 0 + 64 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (53891799920627) and next prime (53891799920653).

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 46055131 + ... + 47210789.

It is an arithmetic number, because the mean of its divisors is an integer number (340776398160).

It is a 1-persistent number, because it is pandigital, but 2⋅53891799920640 = 107783599841280 is not.

Almost surely, 2^{53891799920640} 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 53891799920640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106322236225920).

53891799920640 is an abundant number, since it is smaller than the sum of its proper divisors (158752672531200).

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

53891799920640 is a wasteful number, since it uses less digits than its factorization.

53891799920640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155728 (or 1155703 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 72.

The spelling of 53891799920640 in words is "fifty-three trillion, eight hundred ninety-one billion, seven hundred ninety-nine million, nine hundred twenty thousand, six hundred forty".