326427779128 has 64 divisors (see below), whose sum is σ = 698387961600. Its totient is φ = 141586030080.

The previous prime is 326427779023. The next prime is 326427779137. The reversal of 326427779128 is 821977724623.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655600 + ... + 1040512.

It is an arithmetic number, because the mean of its divisors is an integer number (10912311900).

Almost surely, 2^326427779128 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 326427779128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349193980800).

326427779128 is an abundant number, since it is smaller than the sum of its proper divisors (371960182472).

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

326427779128 is a wasteful number, since it uses less digits than its factorization.

326427779128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385372 (or 385368 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 58.

The spelling of 326427779128 in words is "three hundred twenty-six billion, four hundred twenty-seven million, seven hundred seventy-nine thousand, one hundred twenty-eight".