79026440221 has 4 divisors (see below), whose sum is σ = 79063318912. Its totient is φ = 78989561532.

The previous prime is 79026440197. The next prime is 79026440231. The reversal of 79026440221 is 12204462097.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79026440221 - 2¹³ = 79026432029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79026440231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18436131 + ... + 18440416.

It is an arithmetic number, because the mean of its divisors is an integer number (19765829728).

Almost surely, 2^79026440221 is an apocalyptic number.

It is an amenable number.

79026440221 is a deficient number, since it is larger than the sum of its proper divisors (36878691).

79026440221 is a wasteful number, since it uses less digits than its factorization.

79026440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36878690.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 79026440221 in words is "seventy-nine billion, twenty-six million, four hundred forty thousand, two hundred twenty-one".