78865011 has 12 divisors (see below), whose sum is σ = 114508888. Its totient is φ = 52303104.

The previous prime is 78865001. The next prime is 78865027. The reversal of 78865011 is 11056887.

78865011 is a `hidden beast` number, since 78 + 86 + 501 + 1 = 666.

It is not a de Polignac number, because 78865011 - 2⁵ = 78864979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78865001) 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, 20965 + ... + 24438.

Almost surely, 2^78865011 is an apocalyptic number.

78865011 is a deficient number, since it is larger than the sum of its proper divisors (35643877).

78865011 is a wasteful number, since it uses less digits than its factorization.

78865011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45602 (or 45599 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 78865011 is about 8880.5974461181. The cubic root of 78865011 is about 428.8395083236.

The spelling of 78865011 in words is "seventy-eight million, eight hundred sixty-five thousand, eleven".