51612500815 has 16 divisors (see below), whose sum is σ = 62567663328. Its totient is φ = 40870331776.

The previous prime is 51612500813. The next prime is 51612500833. The reversal of 51612500815 is 51800521615.

It is a cyclic number.

It is not a de Polignac number, because 51612500815 - 2¹ = 51612500813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51612500813) 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, 64929 + ... + 327781.

It is an arithmetic number, because the mean of its divisors is an integer number (3910478958).

Almost surely, 2^51612500815 is an apocalyptic number.

51612500815 is a deficient number, since it is larger than the sum of its proper divisors (10955162513).

51612500815 is a wasteful number, since it uses less digits than its factorization.

51612500815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263258.

The product of its (nonzero) digits is 12000, while the sum is 34.

The spelling of 51612500815 in words is "fifty-one billion, six hundred twelve million, five hundred thousand, eight hundred fifteen".