51918938496 has 512 divisors, whose sum is σ = 167795712000. Its totient is φ = 15753830400.

The previous prime is 51918938459. The next prime is 51918938503. The reversal of 51918938496 is 69483981915.

51918938496 is a `hidden beast` number, since 5 + 1 + 91 + 89 + 384 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 232820241 + ... + 232820463.

It is an arithmetic number, because the mean of its divisors is an integer number (327726000).

Almost surely, 2^51918938496 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 51918938496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83897856000).

51918938496 is an abundant number, since it is smaller than the sum of its proper divisors (115876773504).

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

51918938496 is a wasteful number, since it uses less digits than its factorization.

51918938496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 381 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 51918938496 in words is "fifty-one billion, nine hundred eighteen million, nine hundred thirty-eight thousand, four hundred ninety-six".