78883891607 has 4 divisors (see below), whose sum is σ = 79153120200. Its totient is φ = 78614663016.

The previous prime is 78883891579. The next prime is 78883891621. The reversal of 78883891607 is 70619838887.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78883891607 - 2²⁸ = 78615456151 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 (78883891007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134613857 + ... + 134614442.

It is an arithmetic number, because the mean of its divisors is an integer number (19788280050).

Almost surely, 2^78883891607 is an apocalyptic number.

78883891607 is a deficient number, since it is larger than the sum of its proper divisors (269228593).

78883891607 is a wasteful number, since it uses less digits than its factorization.

78883891607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269228592.

The product of its (nonzero) digits is 32514048, while the sum is 65.

The spelling of 78883891607 in words is "seventy-eight billion, eight hundred eighty-three million, eight hundred ninety-one thousand, six hundred seven".