215907664413 has 16 divisors (see below), whose sum is σ = 329918607360. Its totient is φ = 123032138736.

The previous prime is 215907664409. The next prime is 215907664421. The reversal of 215907664413 is 314466709512.

It is not a de Polignac number, because 215907664413 - 2² = 215907664409 is a prime.

It is a super-2 number, since 2×215907664413² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215907664493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14311845 + ... + 14326922.

It is an arithmetic number, because the mean of its divisors is an integer number (20619912960).

Almost surely, 2^215907664413 is an apocalyptic number.

It is an amenable number.

215907664413 is a deficient number, since it is larger than the sum of its proper divisors (114010942947).

215907664413 is a wasteful number, since it uses less digits than its factorization.

215907664413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28639136.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 215907664413 in words is "two hundred fifteen billion, nine hundred seven million, six hundred sixty-four thousand, four hundred thirteen".