78907886987 has 8 divisors (see below), whose sum is σ = 84410864496. Its totient is φ = 73500613632.

The previous prime is 78907886957. The next prime is 78907886989. The reversal of 78907886987 is 78968870987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78907886987 - 2⁶ = 78907886923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78907886989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23924333 + ... + 23927630.

It is an arithmetic number, because the mean of its divisors is an integer number (10551358062).

Almost surely, 2^78907886987 is an apocalyptic number.

78907886987 is a deficient number, since it is larger than the sum of its proper divisors (5502977509).

78907886987 is a wasteful number, since it uses less digits than its factorization.

78907886987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47852077.

The product of its (nonzero) digits is 682795008, while the sum is 77.

The spelling of 78907886987 in words is "seventy-eight billion, nine hundred seven million, eight hundred eighty-six thousand, nine hundred eighty-seven".