51610864065 has 8 divisors (see below), whose sum is σ = 82577382528. Its totient is φ = 27525794160.

The previous prime is 51610864057. The next prime is 51610864069. The reversal of 51610864065 is 56046801615.

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

It is not a de Polignac number, because 51610864065 - 2³ = 51610864057 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51610864069) 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, 1720362121 + ... + 1720362150.

It is an arithmetic number, because the mean of its divisors is an integer number (10322172816).

Almost surely, 2^51610864065 is an apocalyptic number.

It is an amenable number.

51610864065 is a deficient number, since it is larger than the sum of its proper divisors (30966518463).

51610864065 is a wasteful number, since it uses less digits than its factorization.

51610864065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440724279.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 51610864065 in words is "fifty-one billion, six hundred ten million, eight hundred sixty-four thousand, sixty-five".