79585436021 has 32 divisors (see below), whose sum is σ = 103139232000. Its totient is φ = 59635699200.

The previous prime is 79585436009. The next prime is 79585436039. The reversal of 79585436021 is 12063458597.

It is a happy number.

It is not a de Polignac number, because 79585436021 - 2²² = 79581241717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79585436071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8033171 + ... + 8043071.

It is an arithmetic number, because the mean of its divisors is an integer number (3223101000).

It is a 1-persistent number, because it is pandigital, but 2⋅79585436021 = 159170872042 is not.

Almost surely, 2^79585436021 is an apocalyptic number.

It is an amenable number.

79585436021 is a deficient number, since it is larger than the sum of its proper divisors (23553795979).

79585436021 is a wasteful number, since it uses less digits than its factorization.

79585436021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14589.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 79585436021 in words is "seventy-nine billion, five hundred eighty-five million, four hundred thirty-six thousand, twenty-one".