78816989307 has 16 divisors (see below), whose sum is σ = 120298023680. Its totient is φ = 44964800352.

The previous prime is 78816989299. The next prime is 78816989333. The reversal of 78816989307 is 70398961887.

It is not a de Polignac number, because 78816989307 - 2³ = 78816989299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78816989807) 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, 3048457 + ... + 3074202.

It is an arithmetic number, because the mean of its divisors is an integer number (7518626480).

Almost surely, 2^78816989307 is an apocalyptic number.

78816989307 is a deficient number, since it is larger than the sum of its proper divisors (41481034373).

78816989307 is a wasteful number, since it uses less digits than its factorization.

78816989307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123282.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 78816989307 in words is "seventy-eight billion, eight hundred sixteen million, nine hundred eighty-nine thousand, three hundred seven".