51246965215 has 16 divisors (see below), whose sum is σ = 61634659968. Its totient is φ = 40905444256.

The previous prime is 51246965207. The next prime is 51246965249. The reversal of 51246965215 is 51256964215.

It is a cyclic number.

It is not a de Polignac number, because 51246965215 - 2³ = 51246965207 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10703052 + ... + 10707838.

It is an arithmetic number, because the mean of its divisors is an integer number (3852166248).

Almost surely, 2^51246965215 is an apocalyptic number.

51246965215 is a deficient number, since it is larger than the sum of its proper divisors (10387694753).

51246965215 is a wasteful number, since it uses less digits than its factorization.

51246965215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9158.

The product of its digits is 648000, while the sum is 46.

The spelling of 51246965215 in words is "fifty-one billion, two hundred forty-six million, nine hundred sixty-five thousand, two hundred fifteen".