325638668161 has 4 divisors (see below), whose sum is σ = 325709509972. Its totient is φ = 325567826352.

The previous prime is 325638668137. The next prime is 325638668167. The reversal of 325638668161 is 161866836523.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11681286400 + 313957381761 = 108080^2 + 560319^2 .

It is a cyclic number.

It is not a de Polignac number, because 325638668161 - 2⁹ = 325638667649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325638668167) 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, 35414010 + ... + 35423203.

It is an arithmetic number, because the mean of its divisors is an integer number (81427377493).

Almost surely, 2^325638668161 is an apocalyptic number.

It is an amenable number.

325638668161 is a deficient number, since it is larger than the sum of its proper divisors (70841811).

325638668161 is an equidigital number, since it uses as much as digits as its factorization.

325638668161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70841810.

The product of its digits is 7464960, while the sum is 55.

The spelling of 325638668161 in words is "three hundred twenty-five billion, six hundred thirty-eight million, six hundred sixty-eight thousand, one hundred sixty-one".