1320525111256 has 128 divisors (see below), whose sum is σ = 2879902771200. Its totient is φ = 562562542080.

The previous prime is 1320525111251. The next prime is 1320525111271. The reversal of 1320525111256 is 6521115250231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320525111251) 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, 162802641 + ... + 162810751.

It is an arithmetic number, because the mean of its divisors is an integer number (22499240400).

Almost surely, 2^{1320525111256} 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 1320525111256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439951385600).

1320525111256 is an abundant number, since it is smaller than the sum of its proper divisors (1559377659944).

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

1320525111256 is a wasteful number, since it uses less digits than its factorization.

1320525111256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10529 (or 10525 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 1320525111256 in words is "one trillion, three hundred twenty billion, five hundred twenty-five million, one hundred eleven thousand, two hundred fifty-six".