780868509002 has 24 divisors (see below), whose sum is σ = 1281500059428. Its totient is φ = 355613727360.

The previous prime is 780868508993. The next prime is 780868509007. The reversal of 780868509002 is 200905868087.

It can be written as a sum of positive squares in 2 ways, for example, as 690280150561 + 90588358441 = 830831^2 + 300979^2 .

It is not an unprimeable number, because it can be changed into a prime (780868509007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11916713 + ... + 11982060.

Almost surely, 2^780868509002 is an apocalyptic number.

780868509002 is a deficient number, since it is larger than the sum of its proper divisors (500631550426).

780868509002 is a wasteful number, since it uses less digits than its factorization.

780868509002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23898854 (or 23898823 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 780868509002 in words is "seven hundred eighty billion, eight hundred sixty-eight million, five hundred nine thousand, two".