51011623665017 has 16 divisors (see below), whose sum is σ = 55703591995392. Its totient is φ = 46525159054080.

The previous prime is 51011623664999. The next prime is 51011623665049. The reversal of 51011623665017 is 71056632611015.

It is a cyclic number.

It is not a de Polignac number, because 51011623665017 - 2⁸ = 51011623664761 is a prime.

It is a super-2 number, since 2×51011623665017² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51011623665817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274644734 + ... + 274830407.

It is an arithmetic number, because the mean of its divisors is an integer number (3481474499712).

Almost surely, 2^{51011623665017} is an apocalyptic number.

It is an amenable number.

51011623665017 is a deficient number, since it is larger than the sum of its proper divisors (4691968330375).

51011623665017 is a wasteful number, since it uses less digits than its factorization.

51011623665017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549475328.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 51011623665017 in words is "fifty-one trillion, eleven billion, six hundred twenty-three million, six hundred sixty-five thousand, seventeen".