51398579408 has 120 divisors (see below), whose sum is σ = 113009516928. Its totient is φ = 22614592000.

The previous prime is 51398579383. The next prime is 51398579411. The reversal of 51398579408 is 80497589315.

51398579408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10395785 + ... + 10400727.

Almost surely, 2^51398579408 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 51398579408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56504758464).

51398579408 is an abundant number, since it is smaller than the sum of its proper divisors (61610937520).

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

51398579408 is a wasteful number, since it uses less digits than its factorization.

51398579408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5145 (or 5128 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 51398579408 in words is "fifty-one billion, three hundred ninety-eight million, five hundred seventy-nine thousand, four hundred eight".