78796089909 has 6 divisors (see below), whose sum is σ = 113816574326. Its totient is φ = 52530726600.

The previous prime is 78796089907. The next prime is 78796089971. The reversal of 78796089909 is 90998069787.

78796089909 is a `hidden beast` number, since 7 + 8 + 7 + 9 + 608 + 9 + 9 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60000502500 + 18795587409 = 244950^2 + 137097^2 .

It is not a de Polignac number, because 78796089909 - 2¹ = 78796089907 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78796089907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4377560542 + ... + 4377560559.

Almost surely, 2^78796089909 is an apocalyptic number.

It is an amenable number.

78796089909 is a deficient number, since it is larger than the sum of its proper divisors (35020484417).

78796089909 is a wasteful number, since it uses less digits than its factorization.

78796089909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755121107 (or 8755121104 counting only the distinct ones).

The product of its (nonzero) digits is 123451776, while the sum is 72.

The spelling of 78796089909 in words is "seventy-eight billion, seven hundred ninety-six million, eighty-nine thousand, nine hundred nine".