78861091112 has 16 divisors (see below), whose sum is σ = 147878295840. Its totient is φ = 39426878896.

The previous prime is 78861091097. The next prime is 78861091163. The reversal of 78861091112 is 21119016887.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365828 + ... + 539955.

It is an arithmetic number, because the mean of its divisors is an integer number (9242393490).

Almost surely, 2^78861091112 is an apocalyptic number.

It is an amenable number.

78861091112 is a deficient number, since it is larger than the sum of its proper divisors (69017204728).

78861091112 is a wasteful number, since it uses less digits than its factorization.

78861091112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916672 (or 916668 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 44.

The spelling of 78861091112 in words is "seventy-eight billion, eight hundred sixty-one million, ninety-one thousand, one hundred twelve".