51497576064 has 320 divisors, whose sum is σ = 171092702880. Its totient is φ = 15240960000.

The previous prime is 51497576059. The next prime is 51497576071. The reversal of 51497576064 is 46067579415.

51497576064 is a `hidden beast` number, since 5 + 1 + 4 + 9 + 7 + 576 + 0 + 64 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51497576064.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4898814 + ... + 4909314.

Almost surely, 2^51497576064 is an apocalyptic number.

51497576064 is a gapful number since it is divisible by the number (54) 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 51497576064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85546351440).

51497576064 is an abundant number, since it is smaller than the sum of its proper divisors (119595126816).

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

51497576064 is a wasteful number, since it uses less digits than its factorization.

51497576064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10581 (or 10560 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 51497576064 in words is "fifty-one billion, four hundred ninety-seven million, five hundred seventy-six thousand, sixty-four".