78787694111 has 16 divisors (see below), whose sum is σ = 91641761280. Its totient is φ = 66338917920.

The previous prime is 78787694087. The next prime is 78787694129. The reversal of 78787694111 is 11149678787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78787694111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78787694171) 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, 65600 + ... + 402341.

It is an arithmetic number, because the mean of its divisors is an integer number (5727610080).

Almost surely, 2^78787694111 is an apocalyptic number.

78787694111 is a deficient number, since it is larger than the sum of its proper divisors (12854067169).

78787694111 is a wasteful number, since it uses less digits than its factorization.

78787694111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468374.

The product of its digits is 4741632, while the sum is 59.

The spelling of 78787694111 in words is "seventy-eight billion, seven hundred eighty-seven million, six hundred ninety-four thousand, one hundred eleven".