51556291584 has 352 divisors, whose sum is σ = 162043795200. Its totient is φ = 14566293504.

The previous prime is 51556291583. The next prime is 51556291613. The reversal of 51556291584 is 48519265515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51556291583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119067432 + ... + 119067864.

Almost surely, 2^51556291584 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 51556291584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81021897600).

51556291584 is an abundant number, since it is smaller than the sum of its proper divisors (110487503616).

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

51556291584 is a wasteful number, since it uses less digits than its factorization.

51556291584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 558 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 51.

The spelling of 51556291584 in words is "fifty-one billion, five hundred fifty-six million, two hundred ninety-one thousand, five hundred eighty-four".