51697118592 has 384 divisors, whose sum is σ = 186697405440. Its totient is φ = 13900750848.

The previous prime is 51697118579. The next prime is 51697118623. The reversal of 51697118592 is 29581179615.

It is a happy number.

51697118592 is a `hidden beast` number, since 516 + 9 + 7 + 118 + 5 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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 47 ways as a sum of consecutive naturals, for example, 3694393 + ... + 3708359.

It is an arithmetic number, because the mean of its divisors is an integer number (486191160).

Almost surely, 2^51697118592 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 51697118592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93348702720).

51697118592 is an abundant number, since it is smaller than the sum of its proper divisors (135000286848).

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

51697118592 is a wasteful number, since it uses less digits than its factorization.

51697118592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020 (or 13996 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 54.

The spelling of 51697118592 in words is "fifty-one billion, six hundred ninety-seven million, one hundred eighteen thousand, five hundred ninety-two".