51717057912 has 96 divisors (see below), whose sum is σ = 151038669600. Its totient is φ = 15892132608.

The previous prime is 51717057857. The next prime is 51717057947. The reversal of 51717057912 is 21975071715.

51717057912 is a `hidden beast` number, since 5 + 1 + 7 + 1 + 70 + 579 + 1 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 687789 + ... + 759267.

It is an arithmetic number, because the mean of its divisors is an integer number (1573319475).

Almost surely, 2^51717057912 is an apocalyptic number.

51717057912 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 51717057912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75519334800).

51717057912 is an abundant number, since it is smaller than the sum of its proper divisors (99321611688).

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

51717057912 is a wasteful number, since it uses less digits than its factorization.

51717057912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72277 (or 72270 counting only the distinct ones).

The product of its (nonzero) digits is 154350, while the sum is 45.

The spelling of 51717057912 in words is "fifty-one billion, seven hundred seventeen million, fifty-seven thousand, nine hundred twelve".