326631653376 has 128 divisors (see below), whose sum is σ = 995435756160. Its totient is φ = 93323132928.

The previous prime is 326631653371. The next prime is 326631653393. The reversal of 326631653376 is 673356136623.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326631653371) 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, 450795 + ... + 925461.

It is an arithmetic number, because the mean of its divisors is an integer number (7776841845).

Almost surely, 2^326631653376 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 326631653376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497717878080).

326631653376 is an abundant number, since it is smaller than the sum of its proper divisors (668804102784).

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

326631653376 is an frugal number, since it uses more digits than its factorization.

326631653376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474707 (or 474679 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 51.

Adding to 326631653376 its reverse (673356136623), we get a palindrome (999987789999).

The spelling of 326631653376 in words is "three hundred twenty-six billion, six hundred thirty-one million, six hundred fifty-three thousand, three hundred seventy-six".