53689633920 has 768 divisors, whose sum is σ = 217795132800. Its totient is φ = 12423462912.

The previous prime is 53689633909. The next prime is 53689633979. The reversal of 53689633920 is 2933698635.

53689633920 is a `hidden beast` number, since 536 + 89 + 6 + 3 + 3 + 9 + 20 = 666.

It is a super-2 number, since 2×53689633920² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64920547 + ... + 64921373.

Almost surely, 2^53689633920 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 53689633920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108897566400).

53689633920 is an abundant number, since it is smaller than the sum of its proper divisors (164105498880).

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

53689633920 is a wasteful number, since it uses less digits than its factorization.

53689633920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 54.

The spelling of 53689633920 in words is "fifty-three billion, six hundred eighty-nine million, six hundred thirty-three thousand, nine hundred twenty".