780872668899 has 64 divisors (see below), whose sum is σ = 1149625612800. Its totient is φ = 469647839232.

The previous prime is 780872668897. The next prime is 780872668909. The reversal of 780872668899 is 998866278087.

It is a Cunningham number, because it is equal to 883670²-1.

It is not a de Polignac number, because 780872668899 - 2¹ = 780872668897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (780872668897) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46826227 + ... + 46842899.

It is an arithmetic number, because the mean of its divisors is an integer number (17962900200).

Almost surely, 2^780872668899 is an apocalyptic number.

780872668899 is a deficient number, since it is larger than the sum of its proper divisors (368752943901).

780872668899 is a wasteful number, since it uses less digits than its factorization.

780872668899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17204.

The product of its (nonzero) digits is 1170505728, while the sum is 78.

The spelling of 780872668899 in words is "seven hundred eighty billion, eight hundred seventy-two million, six hundred sixty-eight thousand, eight hundred ninety-nine".