78769436013 has 10 divisors (see below), whose sum is σ = 117667923054. Its totient is φ = 52512957288.

The previous prime is 78769436003. The next prime is 78769436059. The reversal of 78769436013 is 31063496787.

It can be written as a sum of positive squares in only one way, i.e., 77856066729 + 913369284 = 279027^2 + 30222^2 .

It is not a de Polignac number, because 78769436013 - 2¹⁴ = 78769419629 is a prime.

It is a super-2 number, since 2×78769436013² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78769436003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 486231006 + ... + 486231167.

Almost surely, 2^78769436013 is an apocalyptic number.

It is an amenable number.

78769436013 is a deficient number, since it is larger than the sum of its proper divisors (38898487041).

78769436013 is an equidigital number, since it uses as much as digits as its factorization.

78769436013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972462185 (or 972462176 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 78769436013 in words is "seventy-eight billion, seven hundred sixty-nine million, four hundred thirty-six thousand, thirteen".