79748640723 has 4 divisors (see below), whose sum is σ = 106331520968. Its totient is φ = 53165760480.

The previous prime is 79748640691. The next prime is 79748640793. The reversal of 79748640723 is 32704684797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32704684797 = 3 ⋅10901561599.

It is not a de Polignac number, because 79748640723 - 2⁵ = 79748640691 is a prime.

It is a super-2 number, since 2×79748640723² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79748640793) 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, 13291440118 + ... + 13291440123.

It is an arithmetic number, because the mean of its divisors is an integer number (26582880242).

Almost surely, 2^79748640723 is an apocalyptic number.

79748640723 is a deficient number, since it is larger than the sum of its proper divisors (26582880245).

79748640723 is a wasteful number, since it uses less digits than its factorization.

79748640723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26582880244.

The product of its (nonzero) digits is 14224896, while the sum is 57.

The spelling of 79748640723 in words is "seventy-nine billion, seven hundred forty-eight million, six hundred forty thousand, seven hundred twenty-three".