78671616 has 36 divisors (see below), whose sum is σ = 209383272. Its totient is φ = 26223616.

The previous prime is 78671591. The next prime is 78671623. The reversal of 78671616 is 61617687.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50451 + ... + 51986.

It is an arithmetic number, because the mean of its divisors is an integer number (5816202).

Almost surely, 2^78671616 is an apocalyptic number.

It is an amenable number.

78671616 is an abundant number, since it is smaller than the sum of its proper divisors (130711656).

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

78671616 is a wasteful number, since it uses less digits than its factorization.

78671616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102456 (or 102442 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 78671616 is about 8869.7021370506. The cubic root of 78671616 is about 428.4886839620.

The spelling of 78671616 in words is "seventy-eight million, six hundred seventy-one thousand, six hundred sixteen".