51523044123665 has 16 divisors (see below), whose sum is σ = 64263714838848. Its totient is φ = 39621237696576.

The previous prime is 51523044123653. The next prime is 51523044123667. The reversal of 51523044123665 is 56632144032515.

It is a cyclic number.

It is not a de Polignac number, because 51523044123665 - 2²⁶ = 51522977014801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51523044123667) 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, 1677713207 + ... + 1677743916.

It is an arithmetic number, because the mean of its divisors is an integer number (4016482177428).

Almost surely, 2^{51523044123665} is an apocalyptic number.

It is an amenable number.

51523044123665 is a deficient number, since it is larger than the sum of its proper divisors (12740670715183).

51523044123665 is a wasteful number, since it uses less digits than its factorization.

51523044123665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355457248.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 51523044123665 in words is "fifty-one trillion, five hundred twenty-three billion, forty-four million, one hundred twenty-three thousand, six hundred sixty-five".