51537044736 has 108 divisors (see below), whose sum is σ = 149173905972. Its totient is φ = 17111973888.

The previous prime is 51537044711. The next prime is 51537044753. The reversal of 51537044736 is 63744073515.

51537044736 is a `hidden beast` number, since 5 + 1 + 537 + 0 + 44 + 73 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27870299136 + 23666745600 = 166944^2 + 153840^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51537044691 and 51537044700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 548610 + ... + 635646.

Almost surely, 2^51537044736 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 51537044736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74586952986).

51537044736 is an abundant number, since it is smaller than the sum of its proper divisors (97636861236).

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

51537044736 is a wasteful number, since it uses less digits than its factorization.

51537044736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87316 (or 87299 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 45.

The spelling of 51537044736 in words is "fifty-one billion, five hundred thirty-seven million, forty-four thousand, seven hundred thirty-six".