325643633681 has 4 divisors (see below), whose sum is σ = 325866831600. Its totient is φ = 325420435764.

The previous prime is 325643633669. The next prime is 325643633713. The reversal of 325643633681 is 186336346523.

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 325643633681 - 2³⁰ = 324569891857 is a prime.

It is a super-2 number, since 2×325643633681² (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 (325642633681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111596771 + ... + 111599688.

It is an arithmetic number, because the mean of its divisors is an integer number (81466707900).

Almost surely, 2^325643633681 is an apocalyptic number.

It is an amenable number.

325643633681 is a deficient number, since it is larger than the sum of its proper divisors (223197919).

325643633681 is a wasteful number, since it uses less digits than its factorization.

325643633681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223197918.

The product of its digits is 5598720, while the sum is 50.

The spelling of 325643633681 in words is "three hundred twenty-five billion, six hundred forty-three million, six hundred thirty-three thousand, six hundred eighty-one".