78364556 has 12 divisors (see below), whose sum is σ = 137789400. Its totient is φ = 38996160.

The previous prime is 78364549. The next prime is 78364579. The reversal of 78364556 is 65546387.

It is a super-2 number, since 2×78364556² = 12282007274154272, which contains 22 as substring.

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, 45581 + ... + 47268.

It is an arithmetic number, because the mean of its divisors is an integer number (11482450).

Almost surely, 2^78364556 is an apocalyptic number.

It is an amenable number.

78364556 is a deficient number, since it is larger than the sum of its proper divisors (59424844).

78364556 is a wasteful number, since it uses less digits than its factorization.

78364556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93064 (or 93062 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 78364556 is about 8852.3757263234. The cubic root of 78364556 is about 427.9304848232.

The spelling of 78364556 in words is "seventy-eight million, three hundred sixty-four thousand, five hundred fifty-six".