79266613691 has 4 divisors (see below), whose sum is σ = 79267431000. Its totient is φ = 79265796384.

The previous prime is 79266613669. The next prime is 79266613717. The reversal of 79266613691 is 19631666297.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79266613691 - 2¹⁸ = 79266351547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79266613291) 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, 239966 + ... + 464883.

It is an arithmetic number, because the mean of its divisors is an integer number (19816857750).

Almost surely, 2^79266613691 is an apocalyptic number.

79266613691 is a deficient number, since it is larger than the sum of its proper divisors (817309).

79266613691 is a wasteful number, since it uses less digits than its factorization.

79266613691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817308.

The product of its digits is 4408992, while the sum is 56.

The spelling of 79266613691 in words is "seventy-nine billion, two hundred sixty-six million, six hundred thirteen thousand, six hundred ninety-one".