51510555015616 has 56 divisors (see below), whose sum is σ = 102501587289024. Its totient is φ = 25683452820480.

The previous prime is 51510555015599. The next prime is 51510555015683. The reversal of 51510555015616 is 61651055501515.

It is a happy number.

It is a congruent number.

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, 47048761 + ... + 48131143.

It is an arithmetic number, because the mean of its divisors is an integer number (1830385487304).

Almost surely, 2^{51510555015616} is an apocalyptic number.

It is an amenable number.

51510555015616 is a deficient number, since it is larger than the sum of its proper divisors (50991032273408).

51510555015616 is a wasteful number, since it uses less digits than its factorization.

51510555015616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084469 (or 1084459 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 46.

The spelling of 51510555015616 in words is "fifty-one trillion, five hundred ten billion, five hundred fifty-five million, fifteen thousand, six hundred sixteen".