51496580736 has 160 divisors (see below), whose sum is σ = 154773493380. Its totient is φ = 16995225600.

The previous prime is 51496580719. The next prime is 51496580767. The reversal of 51496580736 is 63708569415.

51496580736 is a `hidden beast` number, since 5 + 1 + 496 + 5 + 80 + 73 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50560220736 + 936360000 = 224856^2 + 30600^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1022580 + ... + 1071756.

Almost surely, 2^51496580736 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 51496580736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77386746690).

51496580736 is an abundant number, since it is smaller than the sum of its proper divisors (103276912644).

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

51496580736 is a wasteful number, since it uses less digits than its factorization.

51496580736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49304 (or 49283 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 51496580736 in words is "fifty-one billion, four hundred ninety-six million, five hundred eighty thousand, seven hundred thirty-six".