78968493999 has 20 divisors (see below), whose sum is σ = 117992932200. Its totient is φ = 52633322640.

The previous prime is 78968493991. The next prime is 78968494021. The reversal of 78968493999 is 99939486987.

It is not a de Polignac number, because 78968493999 - 2³ = 78968493991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78968493991) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 240184 + ... + 464354.

It is an arithmetic number, because the mean of its divisors is an integer number (5899646610).

Almost surely, 2^78968493999 is an apocalyptic number.

78968493999 is a deficient number, since it is larger than the sum of its proper divisors (39024438201).

78968493999 is a wasteful number, since it uses less digits than its factorization.

78968493999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228532 (or 228523 counting only the distinct ones).

The product of its digits is 1904684544, while the sum is 81.

The spelling of 78968493999 in words is "seventy-eight billion, nine hundred sixty-eight million, four hundred ninety-three thousand, nine hundred ninety-nine".