785876931009 has 27 divisors (see below), whose sum is σ = 1146088136739. Its totient is φ = 518919883920.

The previous prime is 785876930981. The next prime is 785876931067. The reversal of 785876931009 is 900139678587.

The square root of 785876931009 is 886497.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 547752450609 + 238124480400 = 740103^2 + 487980^2 .

It is not a de Polignac number, because 785876931009 - 2¹¹ = 785876928961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (785876930009) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 289883164 + ... + 289885874.

Almost surely, 2^785876931009 is an apocalyptic number.

785876931009 is the 886497-th square number.

785876931009 is the 443249-th centered octagonal number.

It is an amenable number.

785876931009 is a deficient number, since it is larger than the sum of its proper divisors (360211205730).

785876931009 is an frugal number, since it uses more digits than its factorization.

785876931009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 785876931009 in words is "seven hundred eighty-five billion, eight hundred seventy-six million, nine hundred thirty-one thousand, nine".