326740561620 has 240 divisors, whose sum is σ = 1009853073600. Its totient is φ = 78934901760.

The previous prime is 326740561619. The next prime is 326740561657. The reversal of 326740561620 is 26165047623.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 380372751 + ... + 380373609.

It is an arithmetic number, because the mean of its divisors is an integer number (4207721140).

Almost surely, 2^326740561620 is an apocalyptic number.

326740561620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326740561620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504926536800).

326740561620 is an abundant number, since it is smaller than the sum of its proper divisors (683112511980).

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

326740561620 is a wasteful number, since it uses less digits than its factorization.

326740561620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1313 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 326740561620 in words is "three hundred twenty-six billion, seven hundred forty million, five hundred sixty-one thousand, six hundred twenty".