78807882987 has 20 divisors (see below), whose sum is σ = 117893380176. Its totient is φ = 52463602800.

The previous prime is 78807882973. The next prime is 78807883001. The reversal of 78807882987 is 78928870887.

It is an interprime number because it is at equal distance from previous prime (78807882973) and next prime (78807883001).

It is not a de Polignac number, because 78807882987 - 2²⁰ = 78806834411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78807882917) 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 19 ways as a sum of consecutive naturals, for example, 637183 + ... + 750744.

Almost surely, 2^78807882987 is an apocalyptic number.

78807882987 is a deficient number, since it is larger than the sum of its proper divisors (39085497189).

78807882987 is a wasteful number, since it uses less digits than its factorization.

78807882987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388640 (or 1388631 counting only the distinct ones).

The product of its (nonzero) digits is 202309632, while the sum is 72.

The spelling of 78807882987 in words is "seventy-eight billion, eight hundred seven million, eight hundred eighty-two thousand, nine hundred eighty-seven".