51798344832 has 256 divisors, whose sum is σ = 167435856000. Its totient is φ = 15667015680.

The previous prime is 51798344813. The next prime is 51798344861. The reversal of 51798344832 is 23844389715.

It is a happy number.

51798344832 is a `hidden beast` number, since 51 + 79 + 83 + 448 + 3 + 2 = 666.

It is a super-2 number, since 2×51798344832² (a number of 22 digits) contains 22 as substring.

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

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, 2640982 + ... + 2660522.

Almost surely, 2^51798344832 is an apocalyptic number.

51798344832 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51798344832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83717928000).

51798344832 is an abundant number, since it is smaller than the sum of its proper divisors (115637511168).

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

51798344832 is a wasteful number, since it uses less digits than its factorization.

51798344832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19636 (or 19618 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 51798344832 in words is "fifty-one billion, seven hundred ninety-eight million, three hundred forty-four thousand, eight hundred thirty-two".