320725644901 has 4 divisors (see below), whose sum is σ = 329393905612. Its totient is φ = 312057384192.

The previous prime is 320725644871. The next prime is 320725644907. The reversal of 320725644901 is 109446527023.

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 144380240676 + 176345404225 = 379974^2 + 419935^2 .

It is a cyclic number.

It is not a de Polignac number, because 320725644901 - 2¹⁵ = 320725612133 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 (320725644907) 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, 4334130300 + ... + 4334130373.

It is an arithmetic number, because the mean of its divisors is an integer number (82348476403).

Almost surely, 2^320725644901 is an apocalyptic number.

It is an amenable number.

320725644901 is a deficient number, since it is larger than the sum of its proper divisors (8668260711).

320725644901 is an equidigital number, since it uses as much as digits as its factorization.

320725644901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8668260710.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 320725644901 in words is "three hundred twenty billion, seven hundred twenty-five million, six hundred forty-four thousand, nine hundred one".