53643431520 has 192 divisors, whose sum is σ = 214573847040. Its totient is φ = 12261348864.

The previous prime is 53643431503. The next prime is 53643431533. The reversal of 53643431520 is 2513434635.

53643431520 is a `hidden beast` number, since 5 + 3 + 643 + 4 + 3 + 1 + 5 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 856722 + ... + 917201.

It is an arithmetic number, because the mean of its divisors is an integer number (1117572120).

Almost surely, 2^53643431520 is an apocalyptic number.

It is an amenable number.

53643431520 is an abundant number, since it is smaller than the sum of its proper divisors (160930415520).

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

53643431520 is a wasteful number, since it uses less digits than its factorization.

53643431520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773954 (or 1773940 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 53643431520 in words is "fifty-three billion, six hundred forty-three million, four hundred thirty-one thousand, five hundred twenty".