215479684671 has 16 divisors (see below), whose sum is σ = 289193259264. Its totient is φ = 142710609024.

The previous prime is 215479684661. The next prime is 215479684687. The reversal of 215479684671 is 176486974512.

It is not a de Polignac number, because 215479684671 - 2⁷ = 215479684543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215479684601) 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, 752151 + ... + 998343.

It is an arithmetic number, because the mean of its divisors is an integer number (18074578704).

Almost surely, 2^215479684671 is an apocalyptic number.

215479684671 is a deficient number, since it is larger than the sum of its proper divisors (73713574593).

215479684671 is a wasteful number, since it uses less digits than its factorization.

215479684671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248110.

The product of its digits is 20321280, while the sum is 60.

The spelling of 215479684671 in words is "two hundred fifteen billion, four hundred seventy-nine million, six hundred eighty-four thousand, six hundred seventy-one".