78814975811 has 16 divisors (see below), whose sum is σ = 92748499200. Its totient is φ = 66027954720.

The previous prime is 78814975807. The next prime is 78814975843. The reversal of 78814975811 is 11857941887.

It is not a de Polignac number, because 78814975811 - 2² = 78814975807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78814975111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374405 + ... + 545718.

It is an arithmetic number, because the mean of its divisors is an integer number (5796781200).

Almost surely, 2^78814975811 is an apocalyptic number.

78814975811 is a deficient number, since it is larger than the sum of its proper divisors (13933523389).

78814975811 is a wasteful number, since it uses less digits than its factorization.

78814975811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920746.

The product of its digits is 4515840, while the sum is 59.

The spelling of 78814975811 in words is "seventy-eight billion, eight hundred fourteen million, nine hundred seventy-five thousand, eight hundred eleven".