78809708975 has 24 divisors (see below), whose sum is σ = 98551713120. Its totient is φ = 62515653120.

The previous prime is 78809708969. The next prime is 78809709007. The reversal of 78809708975 is 57980790887.

It is not a de Polignac number, because 78809708975 - 2³⁰ = 77735967151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1684499 + ... + 1730651.

It is an arithmetic number, because the mean of its divisors is an integer number (4106321380).

Almost surely, 2^78809708975 is an apocalyptic number.

78809708975 is a deficient number, since it is larger than the sum of its proper divisors (19742004145).

78809708975 is a wasteful number, since it uses less digits than its factorization.

78809708975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46739 (or 46734 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 68.

The spelling of 78809708975 in words is "seventy-eight billion, eight hundred nine million, seven hundred eight thousand, nine hundred seventy-five".