51596401728 has 112 divisors (see below), whose sum is σ = 140709481344. Its totient is φ = 16673771520.

The previous prime is 51596401709. The next prime is 51596401741. The reversal of 51596401728 is 82710469515.

It is a happy number.

It is a super-2 number, since 2×51596401728² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1983301 + ... + 2009147.

Almost surely, 2^51596401728 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 51596401728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70354740672).

51596401728 is an abundant number, since it is smaller than the sum of its proper divisors (89113079616).

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

51596401728 is a wasteful number, since it uses less digits than its factorization.

51596401728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26180 (or 26170 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 51596401728 in words is "fifty-one billion, five hundred ninety-six million, four hundred one thousand, seven hundred twenty-eight".