78871851107 has 4 divisors (see below), whose sum is σ = 90139258416. Its totient is φ = 67604443800.

The previous prime is 78871851089. The next prime is 78871851127. The reversal of 78871851107 is 70115817887.

It is a happy number.

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 78871851107 - 2²⁸ = 78603415651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78871851127) 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, 5633703644 + ... + 5633703657.

It is an arithmetic number, because the mean of its divisors is an integer number (22534814604).

Almost surely, 2^78871851107 is an apocalyptic number.

78871851107 is a deficient number, since it is larger than the sum of its proper divisors (11267407309).

78871851107 is a wasteful number, since it uses less digits than its factorization.

78871851107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11267407308.

The product of its (nonzero) digits is 878080, while the sum is 53.

The spelling of 78871851107 in words is "seventy-eight billion, eight hundred seventy-one million, eight hundred fifty-one thousand, one hundred seven".