78809708968 has 16 divisors (see below), whose sum is σ = 147832850880. Its totient is φ = 39387615408.

The previous prime is 78809708951. The next prime is 78809708969. The reversal of 78809708968 is 86980790887.

It is a junction number, because it is equal to n+sod(n) for n = 78809708897 and 78809708906.

It is not an unprimeable number, because it can be changed into a prime (78809708969) 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, 2135446 + ... + 2172037.

It is an arithmetic number, because the mean of its divisors is an integer number (9239553180).

Almost surely, 2^78809708968 is an apocalyptic number.

It is an amenable number.

78809708968 is a deficient number, since it is larger than the sum of its proper divisors (69023141912).

78809708968 is a wasteful number, since it uses less digits than its factorization.

78809708968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309776 (or 4309772 counting only the distinct ones).

The product of its (nonzero) digits is 97542144, while the sum is 70.

The spelling of 78809708968 in words is "seventy-eight billion, eight hundred nine million, seven hundred eight thousand, nine hundred sixty-eight".