78081069 has 16 divisors (see below), whose sum is σ = 113863680. Its totient is φ = 47200560.

The previous prime is 78081049. The next prime is 78081071. The reversal of 78081069 is 96018087.

It is not a de Polignac number, because 78081069 - 2¹¹ = 78079021 is a prime.

It is a super-2 number, since 2×78081069² = 12193306672365522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78081049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11004 + ... + 16650.

It is an arithmetic number, because the mean of its divisors is an integer number (7116480).

Almost surely, 2^78081069 is an apocalyptic number.

It is an amenable number.

78081069 is a deficient number, since it is larger than the sum of its proper divisors (35782611).

78081069 is a wasteful number, since it uses less digits than its factorization.

78081069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 78081069 is about 8836.3493027381. The cubic root of 78081069 is about 427.4138426283.

The spelling of 78081069 in words is "seventy-eight million, eighty-one thousand, sixty-nine".