51685258615 has 16 divisors (see below), whose sum is σ = 62613716256. Its totient is φ = 40955760000.

The previous prime is 51685258601. The next prime is 51685258663.

51685258615 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51685258615 - 2¹⁹ = 51684734327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113389 + ... + 340921.

It is an arithmetic number, because the mean of its divisors is an integer number (3913357266).

Almost surely, 2^51685258615 is an apocalyptic number.

51685258615 is a deficient number, since it is larger than the sum of its proper divisors (10928457641).

51685258615 is a wasteful number, since it uses less digits than its factorization.

51685258615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227970.

The product of its digits is 2880000, while the sum is 52.

The spelling of 51685258615 in words is "fifty-one billion, six hundred eighty-five million, two hundred fifty-eight thousand, six hundred fifteen".