815631928215 has 32 divisors (see below), whose sum is σ = 1412530612416. Its totient is φ = 399503569920.

The previous prime is 815631928201. The next prime is 815631928271. The reversal of 815631928215 is 512829136518.

It is not a de Polignac number, because 815631928215 - 2⁸ = 815631927959 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, 10577646 + ... + 10654475.

It is an arithmetic number, because the mean of its divisors is an integer number (44141581638).

Almost surely, 2^815631928215 is an apocalyptic number.

815631928215 is a deficient number, since it is larger than the sum of its proper divisors (596898684201).

815631928215 is a wasteful number, since it uses less digits than its factorization.

815631928215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21232339.

The product of its digits is 1036800, while the sum is 51.

The spelling of 815631928215 in words is "eight hundred fifteen billion, six hundred thirty-one million, nine hundred twenty-eight thousand, two hundred fifteen".