51380428032 has 90 divisors (see below), whose sum is σ = 153207201378. Its totient is φ = 17126802432.

The previous prime is 51380428027. The next prime is 51380428049. The reversal of 51380428032 is 23082408315.

It can be written as a sum of positive squares in only one way, i.e., 51372942336 + 7485696 = 226656^2 + 2736^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1218183 + ... + 1259654.

Almost surely, 2^51380428032 is an apocalyptic number.

It is an amenable number.

51380428032 is an abundant number, since it is smaller than the sum of its proper divisors (101826773346).

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

51380428032 is an equidigital number, since it uses as much as digits as its factorization.

51380428032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477865 (or 2477842 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 51380428032 in words is "fifty-one billion, three hundred eighty million, four hundred twenty-eight thousand, thirty-two".