51085747085 has 16 divisors (see below), whose sum is σ = 62040781440. Its totient is φ = 40379401920.

The previous prime is 51085747039. The next prime is 51085747093. The reversal of 51085747085 is 58074758015.

It is not a de Polignac number, because 51085747085 - 2¹⁸ = 51085484941 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20297 + ... + 320286.

It is an arithmetic number, because the mean of its divisors is an integer number (3877548840).

Almost surely, 2^51085747085 is an apocalyptic number.

It is an amenable number.

51085747085 is a deficient number, since it is larger than the sum of its proper divisors (10955034355).

51085747085 is a wasteful number, since it uses less digits than its factorization.

51085747085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340948.

The product of its (nonzero) digits is 1568000, while the sum is 50.

The spelling of 51085747085 in words is "fifty-one billion, eighty-five million, seven hundred forty-seven thousand, eighty-five".