51500101665 has 64 divisors (see below), whose sum is σ = 91514313216. Its totient is φ = 24598413312.

The previous prime is 51500101637. The next prime is 51500101691. The reversal of 51500101665 is 56610100515.

51500101665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51500101665 - 2²⁷ = 51365883937 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1109197 + ... + 1154693.

It is an arithmetic number, because the mean of its divisors is an integer number (1429911144).

Almost surely, 2^51500101665 is an apocalyptic number.

It is an amenable number.

51500101665 is a deficient number, since it is larger than the sum of its proper divisors (40014211551).

51500101665 is a wasteful number, since it uses less digits than its factorization.

51500101665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45738.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51500101665 in words is "fifty-one billion, five hundred million, one hundred one thousand, six hundred sixty-five".