51016012604639 has 8 divisors (see below), whose sum is σ = 54022629171840. Its totient is φ = 48041552364696.

The previous prime is 51016012604633. The next prime is 51016012604693. The reversal of 51016012604639 is 93640621061015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51016012604639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51016012604639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51016012604633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8039078549 + ... + 8039084894.

It is an arithmetic number, because the mean of its divisors is an integer number (6752828646480).

Almost surely, 2^{51016012604639} is an apocalyptic number.

51016012604639 is a deficient number, since it is larger than the sum of its proper divisors (3006616567201).

51016012604639 is a wasteful number, since it uses less digits than its factorization.

51016012604639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16078163629.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 51016012604639 in words is "fifty-one trillion, sixteen billion, twelve million, six hundred four thousand, six hundred thirty-nine".