51836863815 has 64 divisors (see below), whose sum is σ = 100569530880. Its totient is φ = 25123668480.

The previous prime is 51836863781. The next prime is 51836863843.

51836863815 is a `hidden beast` number, since 5 + 183 + 6 + 86 + 381 + 5 = 666.

51836863815 is nontrivially palindromic in base 10.

51836863815 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 51836863815 - 2⁶ = 51836863751 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, 5628004 + ... + 5637206.

It is an arithmetic number, because the mean of its divisors is an integer number (1571398920).

Almost surely, 2^51836863815 is an apocalyptic number.

51836863815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51836863815 is a deficient number, since it is larger than the sum of its proper divisors (48732667065).

51836863815 is a wasteful number, since it uses less digits than its factorization.

51836863815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13021 (or 13015 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 51836863815 in words is "fifty-one billion, eight hundred thirty-six million, eight hundred sixty-three thousand, eight hundred fifteen".