51672215165 has 16 divisors (see below), whose sum is σ = 62682949056. Its totient is φ = 40889318400.

The previous prime is 51672215141. The next prime is 51672215197. The reversal of 51672215165 is 56151227615.

It is not a de Polignac number, because 51672215165 - 2¹⁶ = 51672149629 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, 21725 + ... + 322205.

It is an arithmetic number, because the mean of its divisors is an integer number (3917684316).

Almost surely, 2^51672215165 is an apocalyptic number.

It is an amenable number.

51672215165 is a deficient number, since it is larger than the sum of its proper divisors (11010733891).

51672215165 is a wasteful number, since it uses less digits than its factorization.

51672215165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300860.

The product of its digits is 126000, while the sum is 41.

The spelling of 51672215165 in words is "fifty-one billion, six hundred seventy-two million, two hundred fifteen thousand, one hundred sixty-five".