78777168 has 40 divisors (see below), whose sum is σ = 204079200. Its totient is φ = 26185344.

The previous prime is 78777163. The next prime is 78777199. The reversal of 78777168 is 86177787.

It is a self number, because there is not a number n which added to its sum of digits gives 78777168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78777163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16563 + ... + 20781.

It is an arithmetic number, because the mean of its divisors is an integer number (5101980).

Almost surely, 2^78777168 is an apocalyptic number.

It is an amenable number.

78777168 is an abundant number, since it is smaller than the sum of its proper divisors (125302032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78777168 is a wasteful number, since it uses less digits than its factorization.

78777168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619 (or 4613 counting only the distinct ones).

The product of its digits is 921984, while the sum is 51.

The square root of 78777168 is about 8875.6502860354. The cubic root of 78777168 is about 428.6802296463.

The spelling of 78777168 in words is "seventy-eight million, seven hundred seventy-seven thousand, one hundred sixty-eight".