51502016720 has 80 divisors (see below), whose sum is σ = 149288980608. Its totient is φ = 16052574720.

The previous prime is 51502016641. The next prime is 51502016723. The reversal of 51502016720 is 2761020515.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51502016723) by changing a digit.

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, 4174199 + ... + 4186518.

Almost surely, 2^51502016720 is an apocalyptic number.

It is an amenable number.

51502016720 is an abundant number, since it is smaller than the sum of its proper divisors (97786963888).

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

51502016720 is a wasteful number, since it uses less digits than its factorization.

51502016720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8360748 (or 8360742 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The spelling of 51502016720 in words is "fifty-one billion, five hundred two million, sixteen thousand, seven hundred twenty".