51204532620565 has 16 divisors (see below), whose sum is σ = 61680400104960. Its totient is φ = 40807260996480.

The previous prime is 51204532620529. The next prime is 51204532620569. The reversal of 51204532620565 is 56502623540215.

It is not a de Polignac number, because 51204532620565 - 2⁹ = 51204532620053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204532620569) 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, 15733981 + ... + 18707410.

It is an arithmetic number, because the mean of its divisors is an integer number (3855025006560).

Almost surely, 2^{51204532620565} is an apocalyptic number.

It is an amenable number.

51204532620565 is a deficient number, since it is larger than the sum of its proper divisors (10475867484395).

51204532620565 is a wasteful number, since it uses less digits than its factorization.

51204532620565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34442532.

The product of its (nonzero) digits is 2160000, while the sum is 46.

The spelling of 51204532620565 in words is "fifty-one trillion, two hundred four billion, five hundred thirty-two million, six hundred twenty thousand, five hundred sixty-five".