78663887002 has 12 divisors (see below), whose sum is σ = 121924935018. Its totient is φ = 38063170200.

The previous prime is 78663886991. The next prime is 78663887021. The reversal of 78663887002 is 20078836687.

It can be written as a sum of positive squares in only one way, i.e., 54359388801 + 24304498201 = 233151^2 + 155899^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20462149 + ... + 20465992.

Almost surely, 2^78663887002 is an apocalyptic number.

78663887002 is a deficient number, since it is larger than the sum of its proper divisors (43261048016).

78663887002 is a wasteful number, since it uses less digits than its factorization.

78663887002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40928205 (or 40928174 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 78663887002 in words is "seventy-eight billion, six hundred sixty-three million, eight hundred eighty-seven thousand, two".