51854845815 has 64 divisors (see below), whose sum is σ = 94005550080. Its totient is φ = 27115516800.

The previous prime is 51854845807. The next prime is 51854845849.

It is a happy number.

51854845815 is a `hidden beast` number, since 5 + 1 + 8 + 54 + 8 + 4 + 581 + 5 = 666.

51854845815 is nontrivially palindromic in base 10.

51854845815 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 51854845815 - 2³ = 51854845807 is a prime.

It is a congruent 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, 1385944 + ... + 1422866.

It is an arithmetic number, because the mean of its divisors is an integer number (1468836720).

Almost surely, 2^51854845815 is an apocalyptic number.

51854845815 is a deficient number, since it is larger than the sum of its proper divisors (42150704265).

51854845815 is a wasteful number, since it uses less digits than its factorization.

51854845815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37141 (or 37135 counting only the distinct ones).

The product of its digits is 5120000, while the sum is 54.

The spelling of 51854845815 in words is "fifty-one billion, eight hundred fifty-four million, eight hundred forty-five thousand, eight hundred fifteen".