78795976745 has 4 divisors (see below), whose sum is σ = 94555172100. Its totient is φ = 63036781392.

The previous prime is 78795976739. The next prime is 78795976747. The reversal of 78795976745 is 54767959787.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28909860841 + 49886115904 = 170029^2 + 223352^2 .

It is a cyclic number.

It is not a de Polignac number, because 78795976745 - 2¹⁰ = 78795975721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78795976747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7879597670 + ... + 7879597679.

It is an arithmetic number, because the mean of its divisors is an integer number (23638793025).

Almost surely, 2^78795976745 is an apocalyptic number.

It is an amenable number.

78795976745 is a deficient number, since it is larger than the sum of its proper divisors (15759195355).

78795976745 is a wasteful number, since it uses less digits than its factorization.

78795976745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15759195354.

The product of its digits is 933508800, while the sum is 74.

The spelling of 78795976745 in words is "seventy-eight billion, seven hundred ninety-five million, nine hundred seventy-six thousand, seven hundred forty-five".