51651566085 has 32 divisors (see below), whose sum is σ = 95996927232. Its totient is φ = 23225057280.

The previous prime is 51651566059. The next prime is 51651566093. The reversal of 51651566085 is 58066515615.

It is not a de Polignac number, because 51651566085 - 2⁸ = 51651565829 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4025724 + ... + 4038533.

It is an arithmetic number, because the mean of its divisors is an integer number (2999903976).

Almost surely, 2^51651566085 is an apocalyptic number.

It is an amenable number.

51651566085 is a deficient number, since it is larger than the sum of its proper divisors (44345361147).

51651566085 is a wasteful number, since it uses less digits than its factorization.

51651566085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8064333.

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 51651566085 in words is "fifty-one billion, six hundred fifty-one million, five hundred sixty-six thousand, eighty-five".