51040476432 has 480 divisors, whose sum is σ = 169119711360. Its totient is φ = 14605194240.

The previous prime is 51040476353. The next prime is 51040476491. The reversal of 51040476432 is 23467404015.

51040476432 is a `hidden beast` number, since 5 + 1 + 0 + 4 + 0 + 4 + 7 + 643 + 2 = 666.

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 95 ways as a sum of consecutive naturals, for example, 325098498 + ... + 325098654.

It is an arithmetic number, because the mean of its divisors is an integer number (352332732).

Almost surely, 2^51040476432 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 51040476432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84559855680).

51040476432 is an abundant number, since it is smaller than the sum of its proper divisors (118079234928).

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

51040476432 is a wasteful number, since it uses less digits than its factorization.

51040476432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 51040476432 in words is "fifty-one billion, forty million, four hundred seventy-six thousand, four hundred thirty-two".