78643650002 has 16 divisors (see below), whose sum is σ = 119603125152. Its totient is φ = 38776137120.

The previous prime is 78643649993. The next prime is 78643650011. The reversal of 78643650002 is 20005634687.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78643649993) and next prime (78643650011).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 810677 + ... + 902487.

It is an arithmetic number, because the mean of its divisors is an integer number (7475195322).

Almost surely, 2^78643650002 is an apocalyptic number.

78643650002 is a deficient number, since it is larger than the sum of its proper divisors (40959475150).

78643650002 is a wasteful number, since it uses less digits than its factorization.

78643650002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97753.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 78643650002 in words is "seventy-eight billion, six hundred forty-three million, six hundred fifty thousand, two".