53251649520 has 80 divisors (see below), whose sum is σ = 169106488992. Its totient is φ = 13854085120.

The previous prime is 53251649509. The next prime is 53251649573. The reversal of 53251649520 is 2594615235.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 2696037 + ... + 2715716.

Almost surely, 2^53251649520 is an apocalyptic number.

It is an amenable number.

53251649520 is an abundant number, since it is smaller than the sum of its proper divisors (115854839472).

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

53251649520 is a wasteful number, since it uses less digits than its factorization.

53251649520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411810 (or 5411804 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 53251649520 in words is "fifty-three billion, two hundred fifty-one million, six hundred forty-nine thousand, five hundred twenty".