165331625323621 has 8 divisors (see below), whose sum is σ = 165364039797984. Its totient is φ = 165299212456560.

The previous prime is 165331625323519. The next prime is 165331625323649. The reversal of 165331625323621 is 126323526133561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165331625323621 - 2²³ = 165331616935013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165331625323021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216771486 + ... + 217532848.

It is an arithmetic number, because the mean of its divisors is an integer number (20670504974748).

Almost surely, 2^{165331625323621} is an apocalyptic number.

It is an amenable number.

165331625323621 is a deficient number, since it is larger than the sum of its proper divisors (32414474363).

165331625323621 is an equidigital number, since it uses as much as digits as its factorization.

165331625323621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803651.

The product of its digits is 3499200, while the sum is 49.

The spelling of 165331625323621 in words is "one hundred sixty-five trillion, three hundred thirty-one billion, six hundred twenty-five million, three hundred twenty-three thousand, six hundred twenty-one".