78468763513 has 6 divisors (see below), whose sum is σ = 91279990266. Its totient is φ = 67258940112.

The previous prime is 78468763511. The next prime is 78468763519. The reversal of 78468763513 is 31536786487.

It can be written as a sum of positive squares in only one way, i.e., 43560698944 + 34908064569 = 208712^2 + 186837^2 .

It is not a de Polignac number, because 78468763513 - 2¹ = 78468763511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78468763511) 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, 800701620 + ... + 800701717.

It is an arithmetic number, because the mean of its divisors is an integer number (15213331711).

Almost surely, 2^78468763513 is an apocalyptic number.

It is an amenable number.

78468763513 is a deficient number, since it is larger than the sum of its proper divisors (12811226753).

78468763513 is a wasteful number, since it uses less digits than its factorization.

78468763513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601403351 (or 1601403344 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 58.

The spelling of 78468763513 in words is "seventy-eight billion, four hundred sixty-eight million, seven hundred sixty-three thousand, five hundred thirteen".