78792831009 has 12 divisors (see below), whose sum is σ = 114134284836. Its totient is φ = 52379745792.

The previous prime is 78792830971. The next prime is 78792831031. The reversal of 78792831009 is 90013829787.

It can be written as a sum of positive squares in 2 ways, for example, as 55635600384 + 23157230625 = 235872^2 + 152175^2 .

It is not a de Polignac number, because 78792831009 - 2¹² = 78792826913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78792831079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12397332 + ... + 12403685.

It is an arithmetic number, because the mean of its divisors is an integer number (9511190403).

Almost surely, 2^78792831009 is an apocalyptic number.

It is an amenable number.

78792831009 is a deficient number, since it is larger than the sum of its proper divisors (35341453827).

78792831009 is a wasteful number, since it uses less digits than its factorization.

78792831009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24801376 (or 24801373 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 78792831009 in words is "seventy-eight billion, seven hundred ninety-two million, eight hundred thirty-one thousand, nine".