78507448713 has 6 divisors (see below), whose sum is σ = 113399648154. Its totient is φ = 52338299136.

The previous prime is 78507448697. The next prime is 78507448741. The reversal of 78507448713 is 31784470587.

78507448713 is a `hidden beast` number, since 7 + 8 + 507 + 44 + 87 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45553218624 + 32954230089 = 213432^2 + 181533^2 .

It is not a de Polignac number, because 78507448713 - 2⁴ = 78507448697 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78507448713.

It is not an unprimeable number, because it can be changed into a prime (78507448813) 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, 4361524920 + ... + 4361524937.

It is an arithmetic number, because the mean of its divisors is an integer number (18899941359).

Almost surely, 2^78507448713 is an apocalyptic number.

It is an amenable number.

78507448713 is a deficient number, since it is larger than the sum of its proper divisors (34892199441).

78507448713 is a wasteful number, since it uses less digits than its factorization.

78507448713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8723049863 (or 8723049860 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 78507448713 in words is "seventy-eight billion, five hundred seven million, four hundred forty-eight thousand, seven hundred thirteen".