51115343568 has 60 divisors (see below), whose sum is σ = 132340368960. Its totient is φ = 17000769536.

The previous prime is 51115343533. The next prime is 51115343593. The reversal of 51115343568 is 86534351115.

It is a super-2 number, since 2×51115343568² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42000496 + ... + 42001712.

It is an arithmetic number, because the mean of its divisors is an integer number (2205672816).

Almost surely, 2^51115343568 is an apocalyptic number.

It is an amenable number.

51115343568 is an abundant number, since it is smaller than the sum of its proper divisors (81225025392).

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

51115343568 is an equidigital number, since it uses as much as digits as its factorization.

51115343568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164 (or 1941 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The spelling of 51115343568 in words is "fifty-one billion, one hundred fifteen million, three hundred forty-three thousand, five hundred sixty-eight".