51855455815 has 16 divisors (see below), whose sum is σ = 63888271776. Its totient is φ = 40381120000.

The previous prime is 51855455797. The next prime is 51855455833.

51855455815 is nontrivially palindromic in base 10.

51855455815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51855455797) and next prime (51855455833).

It is not a de Polignac number, because 51855455815 - 2⁵ = 51855455783 is a prime.

It is a Duffinian number.

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, 194686 + ... + 376315.

It is an arithmetic number, because the mean of its divisors is an integer number (3993016986).

Almost surely, 2^51855455815 is an apocalyptic number.

51855455815 is a deficient number, since it is larger than the sum of its proper divisors (12032815961).

51855455815 is a wasteful number, since it uses less digits than its factorization.

51855455815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571490.

The product of its digits is 4000000, while the sum is 52.

The spelling of 51855455815 in words is "fifty-one billion, eight hundred fifty-five million, four hundred fifty-five thousand, eight hundred fifteen".