215913792680 has 16 divisors (see below), whose sum is σ = 485806033620. Its totient is φ = 86365517056.

The previous prime is 215913792629. The next prime is 215913792697. The reversal of 215913792680 is 86297319512.

It can be written as a sum of positive squares in 2 ways, for example, as 211064898724 + 4848893956 = 459418^2 + 69634^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698922369 + ... + 2698922448.

Almost surely, 2^215913792680 is an apocalyptic number.

215913792680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215913792680 is an abundant number, since it is smaller than the sum of its proper divisors (269892240940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215913792680 is a wasteful number, since it uses less digits than its factorization.

215913792680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397844828 (or 5397844824 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 215913792680 in words is "two hundred fifteen billion, nine hundred thirteen million, seven hundred ninety-two thousand, six hundred eighty".