325809709681 has 4 divisors (see below), whose sum is σ = 325811331072. Its totient is φ = 325808088292.

The previous prime is 325809709657. The next prime is 325809709711. The reversal of 325809709681 is 186907908523.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 325809709681 - 2²³ = 325801321073 is a prime.

It is a super-2 number, since 2×325809709681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325809709601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458185 + ... + 928198.

It is an arithmetic number, because the mean of its divisors is an integer number (81452832768).

Almost surely, 2^325809709681 is an apocalyptic number.

It is an amenable number.

325809709681 is a deficient number, since it is larger than the sum of its proper divisors (1621391).

325809709681 is a wasteful number, since it uses less digits than its factorization.

325809709681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621390.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 325809709681 in words is "three hundred twenty-five billion, eight hundred nine million, seven hundred nine thousand, six hundred eighty-one".