86790221521 has 8 divisors (see below), whose sum is σ = 87929340800. Its totient is φ = 85652115120.

The previous prime is 86790221509. The next prime is 86790221549. The reversal of 86790221521 is 12512209768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86790221521 - 2⁷ = 86790221393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86790221321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79950 + ... + 424231.

It is an arithmetic number, because the mean of its divisors is an integer number (10991167600).

Almost surely, 2^86790221521 is an apocalyptic number.

It is an amenable number.

86790221521 is a deficient number, since it is larger than the sum of its proper divisors (1139119279).

86790221521 is a wasteful number, since it uses less digits than its factorization.

86790221521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506439.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 86790221521 in words is "eighty-six billion, seven hundred ninety million, two hundred twenty-one thousand, five hundred twenty-one".