51239704896 has 224 divisors, whose sum is σ = 159825415680. Its totient is φ = 16042033152.

The previous prime is 51239704837. The next prime is 51239704909. The reversal of 51239704896 is 69840793215.

51239704896 is a `hidden beast` number, since 51 + 23 + 97 + 0 + 489 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16948441 + ... + 16951463.

It is an arithmetic number, because the mean of its divisors is an integer number (713506320).

It is a 1-persistent number, because it is pandigital, but 2⋅51239704896 = 102479409792 is not.

Almost surely, 2^51239704896 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 51239704896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79912707840).

51239704896 is an abundant number, since it is smaller than the sum of its proper divisors (108585710784).

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

51239704896 is a wasteful number, since it uses less digits than its factorization.

51239704896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638 (or 3622 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 51239704896 in words is "fifty-one billion, two hundred thirty-nine million, seven hundred four thousand, eight hundred ninety-six".