78715612 has 6 divisors (see below), whose sum is σ = 137752328. Its totient is φ = 39357804.

The previous prime is 78715583. The next prime is 78715631. The reversal of 78715612 is 21651787.

It is a super-2 number, since 2×78715612² = 12392295145069088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9839448 + ... + 9839455.

Almost surely, 2^78715612 is an apocalyptic number.

It is an amenable number.

78715612 is a deficient number, since it is larger than the sum of its proper divisors (59036716).

78715612 is a wasteful number, since it uses less digits than its factorization.

78715612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19678907 (or 19678905 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 78715612 is about 8872.1819187841. The cubic root of 78715612 is about 428.5685445097.

The spelling of 78715612 in words is "seventy-eight million, seven hundred fifteen thousand, six hundred twelve".