1325236405668 has 144 divisors (see below), whose sum is σ = 3721952566080. Its totient is φ = 365499407616.

The previous prime is 1325236405667. The next prime is 1325236405711. The reversal of 1325236405668 is 8665046325231.

It is a self number, because there is not a number n which added to its sum of digits gives 1325236405668.

It is not an unprimeable number, because it can be changed into a prime (1325236405667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142601230 + ... + 142610522.

It is an arithmetic number, because the mean of its divisors is an integer number (25846892820).

Almost surely, 2^{1325236405668} 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 1325236405668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1860976283040).

1325236405668 is an abundant number, since it is smaller than the sum of its proper divisors (2396716160412).

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

1325236405668 is a wasteful number, since it uses less digits than its factorization.

1325236405668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17706 (or 17697 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 1325236405668 in words is "one trillion, three hundred twenty-five billion, two hundred thirty-six million, four hundred five thousand, six hundred sixty-eight".