828791707509 has 24 divisors (see below), whose sum is σ = 1248417948960. Its totient is φ = 549441028656.

The previous prime is 828791707507. The next prime is 828791707519. The reversal of 828791707509 is 905707197828.

It is not a de Polignac number, because 828791707509 - 2¹ = 828791707507 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (828791707507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9483502 + ... + 9570495.

It is an arithmetic number, because the mean of its divisors is an integer number (52017414540).

Almost surely, 2^828791707509 is an apocalyptic number.

It is an amenable number.

828791707509 is a deficient number, since it is larger than the sum of its proper divisors (419626241451).

828791707509 is a wasteful number, since it uses less digits than its factorization.

828791707509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19054191 (or 19054179 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 63.

The spelling of 828791707509 in words is "eight hundred twenty-eight billion, seven hundred ninety-one million, seven hundred seven thousand, five hundred nine".