79723815799 has 4 divisors (see below), whose sum is σ = 80075022264. Its totient is φ = 79372609336.

The previous prime is 79723815781. The next prime is 79723815817. The reversal of 79723815799 is 99751832797.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (79723815781) and next prime (79723815817).

It is a cyclic number.

It is not a de Polignac number, because 79723815799 - 2⁷ = 79723815671 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 (79723815299) 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, 175602892 + ... + 175603345.

It is an arithmetic number, because the mean of its divisors is an integer number (20018755566).

Almost surely, 2^79723815799 is an apocalyptic number.

79723815799 is a deficient number, since it is larger than the sum of its proper divisors (351206465).

79723815799 is a wasteful number, since it uses less digits than its factorization.

79723815799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351206464.

The product of its digits is 60011280, while the sum is 67.

The spelling of 79723815799 in words is "seventy-nine billion, seven hundred twenty-three million, eight hundred fifteen thousand, seven hundred ninety-nine".