78597981143 has 4 divisors (see below), whose sum is σ = 85743252168. Its totient is φ = 71452710120.

The previous prime is 78597981139. The next prime is 78597981227. The reversal of 78597981143 is 34118979587.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78597981143 - 2² = 78597981139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78597981113) 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, 3572635496 + ... + 3572635517.

It is an arithmetic number, because the mean of its divisors is an integer number (21435813042).

Almost surely, 2^78597981143 is an apocalyptic number.

78597981143 is a deficient number, since it is larger than the sum of its proper divisors (7145271025).

78597981143 is a wasteful number, since it uses less digits than its factorization.

78597981143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145271024.

The product of its digits is 15240960, while the sum is 62.

The spelling of 78597981143 in words is "seventy-eight billion, five hundred ninety-seven million, nine hundred eighty-one thousand, one hundred forty-three".