78712618 has 24 divisors (see below), whose sum is σ = 128380032. Its totient is φ = 36168384.

The previous prime is 78712607. The next prime is 78712619. The reversal of 78712618 is 81621787.

It is not an unprimeable number, because it can be changed into a prime (78712619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23271 + ... + 26437.

It is an arithmetic number, because the mean of its divisors is an integer number (5349168).

Almost surely, 2^78712618 is an apocalyptic number.

78712618 is a deficient number, since it is larger than the sum of its proper divisors (49667414).

78712618 is a wasteful number, since it uses less digits than its factorization.

78712618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246 (or 3229 counting only the distinct ones).

The product of its digits is 37632, while the sum is 40.

The square root of 78712618 is about 8872.0131875466. The cubic root of 78712618 is about 428.5631108121.

The spelling of 78712618 in words is "seventy-eight million, seven hundred twelve thousand, six hundred eighteen".