326157664 has 192 divisors, whose sum is σ = 827366400. Its totient is φ = 123475968.

The previous prime is 326157661. The next prime is 326157679. The reversal of 326157664 is 466751623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326157661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5528067 + ... + 5528125.

It is an arithmetic number, because the mean of its divisors is an integer number (4309200).

Almost surely, 2^326157664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326157664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413683200).

326157664 is an abundant number, since it is smaller than the sum of its proper divisors (501208736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

326157664 is a wasteful number, since it uses less digits than its factorization.

326157664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 157 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

The square root of 326157664 is about 18059.8356581670. The cubic root of 326157664 is about 688.3498085914.

The spelling of 326157664 in words is "three hundred twenty-six million, one hundred fifty-seven thousand, six hundred sixty-four".