51055968516 has 24 divisors (see below), whose sum is σ = 136149249600. Its totient is φ = 14587419552.

The previous prime is 51055968493. The next prime is 51055968559. The reversal of 51055968516 is 61586955015.

It is a happy number.

It is a super-2 number, since 2×51055968516² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303904491 + ... + 303904658.

It is an arithmetic number, because the mean of its divisors is an integer number (5672885400).

Almost surely, 2^51055968516 is an apocalyptic number.

It is an amenable number.

51055968516 is an abundant number, since it is smaller than the sum of its proper divisors (85093281084).

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

51055968516 is a wasteful number, since it uses less digits than its factorization.

51055968516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607809163 (or 607809161 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 51.

The spelling of 51055968516 in words is "fifty-one billion, fifty-five million, nine hundred sixty-eight thousand, five hundred sixteen".