831869860761 has 15 divisors (see below), whose sum is σ = 1242682054383. Its totient is φ = 554574434760.

The previous prime is 831869860739. The next prime is 831869860781. The reversal of 831869860761 is 167068968138.

The square root of 831869860761 is 912069.

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

831869860761 is a `hidden beast` number, since 8 + 3 + 18 + 6 + 9 + 8 + 607 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 763842788361 + 68027072400 = 873981^2 + 260820^2 .

It is not a de Polignac number, because 831869860761 - 2¹⁷ = 831869729689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (831869860781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 8157951 + ... + 8259291.

Almost surely, 2^831869860761 is an apocalyptic number.

831869860761 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

831869860761 is the 912069-th square number.

831869860761 is the 456035-th centered octagonal number.

It is an amenable number.

831869860761 is a deficient number, since it is larger than the sum of its proper divisors (410812193622).

831869860761 is an frugal number, since it uses more digits than its factorization.

831869860761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202694 (or 101344 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 831869860761 in words is "eight hundred thirty-one billion, eight hundred sixty-nine million, eight hundred sixty thousand, seven hundred sixty-one".