78750081 has 12 divisors (see below), whose sum is σ = 113847552. Its totient is φ = 52455096.

The previous prime is 78750059. The next prime is 78750083. The reversal of 78750081 is 18005787.

78750081 is a `hidden beast` number, since 78 + 7 + 500 + 81 = 666.

It is not a de Polignac number, because 78750081 - 2⁹ = 78749569 is a prime.

It is a super-2 number, since 2×78750081² = 12403150515013122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78750083) 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, 10000 + ... + 16046.

It is an arithmetic number, because the mean of its divisors is an integer number (9487296).

Almost surely, 2^78750081 is an apocalyptic number.

It is an amenable number.

78750081 is a deficient number, since it is larger than the sum of its proper divisors (35097471).

78750081 is a wasteful number, since it uses less digits than its factorization.

78750081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500 (or 7497 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 78750081 is about 8874.1242384812. The cubic root of 78750081 is about 428.6310910748.

The spelling of 78750081 in words is "seventy-eight million, seven hundred fifty thousand, eighty-one".