1328532367881 has 16 divisors (see below), whose sum is σ = 1820167409984. Its totient is φ = 861316887744.

The previous prime is 1328532367859. The next prime is 1328532367907. The reversal of 1328532367881 is 1887632358231.

It is not a de Polignac number, because 1328532367881 - 2⁹ = 1328532367369 is a prime.

It is a super-2 number, since 2×1328532367881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1328532367801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2791210 + ... + 3232323.

It is an arithmetic number, because the mean of its divisors is an integer number (113760463124).

Almost surely, 2^{1328532367881} is an apocalyptic number.

It is an amenable number.

1328532367881 is a deficient number, since it is larger than the sum of its proper divisors (491635042103).

1328532367881 is a wasteful number, since it uses less digits than its factorization.

1328532367881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025560.

The product of its digits is 11612160, while the sum is 57.

The spelling of 1328532367881 in words is "one trillion, three hundred twenty-eight billion, five hundred thirty-two million, three hundred sixty-seven thousand, eight hundred eighty-one".