79726571709 has 16 divisors (see below), whose sum is σ = 110965928832. Its totient is φ = 50820881408.

The previous prime is 79726571681. The next prime is 79726571711. The reversal of 79726571709 is 90717562797.

It is a cyclic number.

It is not a de Polignac number, because 79726571709 - 2¹³ = 79726563517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79726571759) 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, 34104 + ... + 400769.

It is an arithmetic number, because the mean of its divisors is an integer number (6935370552).

Almost surely, 2^79726571709 is an apocalyptic number.

It is an amenable number.

79726571709 is a deficient number, since it is larger than the sum of its proper divisors (31239357123).

79726571709 is a wasteful number, since it uses less digits than its factorization.

79726571709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437556.

The product of its (nonzero) digits is 11668860, while the sum is 60.

The spelling of 79726571709 in words is "seventy-nine billion, seven hundred twenty-six million, five hundred seventy-one thousand, seven hundred nine".