79015805801 has 4 divisors (see below), whose sum is σ = 79017641604. Its totient is φ = 79013970000.

The previous prime is 79015805719. The next prime is 79015805893. The reversal of 79015805801 is 10850851097.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 77924164201 + 1091641600 = 279149^2 + 33040^2 .

It is a cyclic number.

It is not a de Polignac number, because 79015805801 - 2¹⁴ = 79015789417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79015855801) 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, 851750 + ... + 939951.

It is an arithmetic number, because the mean of its divisors is an integer number (19754410401).

Almost surely, 2^79015805801 is an apocalyptic number.

It is an amenable number.

79015805801 is a deficient number, since it is larger than the sum of its proper divisors (1835803).

79015805801 is a wasteful number, since it uses less digits than its factorization.

79015805801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835802.

The product of its (nonzero) digits is 100800, while the sum is 44.

The spelling of 79015805801 in words is "seventy-nine billion, fifteen million, eight hundred five thousand, eight hundred one".