78431099793 has 8 divisors (see below), whose sum is σ = 104608908768. Its totient is φ = 52270345344.

The previous prime is 78431099737. The next prime is 78431099797. The reversal of 78431099793 is 39799013487.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78431099793 - 2¹⁸ = 78430837649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78431099797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4252896 + ... + 4271297.

It is an arithmetic number, because the mean of its divisors is an integer number (13076113596).

Almost surely, 2^78431099793 is an apocalyptic number.

It is an amenable number.

78431099793 is a deficient number, since it is larger than the sum of its proper divisors (26177808975).

78431099793 is a wasteful number, since it uses less digits than its factorization.

78431099793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527263.

The product of its (nonzero) digits is 10287648, while the sum is 60.

The spelling of 78431099793 in words is "seventy-eight billion, four hundred thirty-one million, ninety-nine thousand, seven hundred ninety-three".