78765081 has 8 divisors (see below), whose sum is σ = 105420480. Its totient is φ = 52309872.

The previous prime is 78765053. The next prime is 78765149. The reversal of 78765081 is 18056787.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78765081 - 2⁷ = 78764953 is a prime.

It is a super-2 number, since 2×78765081² = 12407875969873122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78765031) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 49126 + ... + 50703.

It is an arithmetic number, because the mean of its divisors is an integer number (13177560).

Almost surely, 2^78765081 is an apocalyptic number.

It is an amenable number.

78765081 is a deficient number, since it is larger than the sum of its proper divisors (26655399).

78765081 is a wasteful number, since it uses less digits than its factorization.

78765081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100095.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 78765081 is about 8874.9693520598. The cubic root of 78765081 is about 428.6583039915.

The spelling of 78765081 in words is "seventy-eight million, seven hundred sixty-five thousand, eighty-one".