78794923497 has 32 divisors (see below), whose sum is σ = 109991229696. Its totient is φ = 50079744000.

The previous prime is 78794923453. The next prime is 78794923591. The reversal of 78794923497 is 79432949787.

It is not a de Polignac number, because 78794923497 - 2⁸ = 78794923241 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (78794913497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41448247 + ... + 41450147.

It is an arithmetic number, because the mean of its divisors is an integer number (3437225928).

Almost surely, 2^78794923497 is an apocalyptic number.

It is an amenable number.

78794923497 is a deficient number, since it is larger than the sum of its proper divisors (31196306199).

78794923497 is a wasteful number, since it uses less digits than its factorization.

78794923497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601.

The product of its digits is 192036096, while the sum is 69.

The spelling of 78794923497 in words is "seventy-eight billion, seven hundred ninety-four million, nine hundred twenty-three thousand, four hundred ninety-seven".