78794926499 has 4 divisors (see below), whose sum is σ = 81511992960. Its totient is φ = 76077860040.

The previous prime is 78794926489. The next prime is 78794926501. The reversal of 78794926499 is 99462949787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99462949787 = 863 ⋅115252549.

It is a cyclic number.

It is not a de Polignac number, because 78794926499 - 2²⁴ = 78778149283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78794926409) 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, 1358533187 + ... + 1358533244.

It is an arithmetic number, because the mean of its divisors is an integer number (20377998240).

Almost surely, 2^78794926499 is an apocalyptic number.

78794926499 is a deficient number, since it is larger than the sum of its proper divisors (2717066461).

78794926499 is a wasteful number, since it uses less digits than its factorization.

78794926499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717066460.

The product of its digits is 493807104, while the sum is 74.

The spelling of 78794926499 in words is "seventy-eight billion, seven hundred ninety-four million, nine hundred twenty-six thousand, four hundred ninety-nine".