78691288002 has 16 divisors (see below), whose sum is σ = 157394054880. Its totient is φ = 26228516192.

The previous prime is 78691288001. The next prime is 78691288009. The reversal of 78691288002 is 20088219687.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78691288001) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 387852 + ... + 554807.

It is an arithmetic number, because the mean of its divisors is an integer number (9837128430).

Almost surely, 2^78691288002 is an apocalyptic number.

78691288002 is an abundant number, since it is smaller than the sum of its proper divisors (78702766878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78691288002 is a wasteful number, since it uses less digits than its factorization.

78691288002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956577.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 78691288002 in words is "seventy-eight billion, six hundred ninety-one million, two hundred eighty-eight thousand, two".