51389793215 has 32 divisors (see below), whose sum is σ = 66257049600. Its totient is φ = 38177516160.

The previous prime is 51389793197. The next prime is 51389793227. The reversal of 51389793215 is 51239798315.

It is not a de Polignac number, because 51389793215 - 2²⁰ = 51388744639 is a prime.

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, 697616 + ... + 767754.

It is an arithmetic number, because the mean of its divisors is an integer number (2070532800).

Almost surely, 2^51389793215 is an apocalyptic number.

51389793215 is a deficient number, since it is larger than the sum of its proper divisors (14867256385).

51389793215 is a wasteful number, since it uses less digits than its factorization.

51389793215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70367.

The product of its digits is 2041200, while the sum is 53.

The spelling of 51389793215 in words is "fifty-one billion, three hundred eighty-nine million, seven hundred ninety-three thousand, two hundred fifteen".