79286956221 has 12 divisors (see below), whose sum is σ = 116200167776. Its totient is φ = 48052700520.

The previous prime is 79286956213. The next prime is 79286956291. The reversal of 79286956221 is 12265968297.

It is not a de Polignac number, because 79286956221 - 2³ = 79286956213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79286956211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109210321 + ... + 109211046.

Almost surely, 2^79286956221 is an apocalyptic number.

It is an amenable number.

79286956221 is a deficient number, since it is larger than the sum of its proper divisors (36913211555).

79286956221 is a wasteful number, since it uses less digits than its factorization.

79286956221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218421392 (or 218421381 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The spelling of 79286956221 in words is "seventy-nine billion, two hundred eighty-six million, nine hundred fifty-six thousand, two hundred twenty-one".