32545781321881 has 3 divisors (see below), whose sum is σ = 32545787026773. Its totient is φ = 32545775616990.

The previous prime is 32545781321863. The next prime is 32545781321903. The reversal of 32545781321881 is 18812318754523.

The square root of 32545781321881 is 5704891.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-32545781321881 is a prime.

It is a super-4 number, since 4×32545781321881⁴ (a number of 55 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32545781325881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2852446 + ... + 8557336.

It is an arithmetic number, because the mean of its divisors is an integer number (10848595675591).

Almost surely, 2^{32545781321881} is an apocalyptic number.

32545781321881 is the 5704891-st square number.

32545781321881 is the 2852446-th centered octagonal number.

It is an amenable number.

32545781321881 is a deficient number, since it is larger than the sum of its proper divisors (5704892).

32545781321881 is an frugal number, since it uses more digits than its factorization.

32545781321881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11409782 (or 5704891 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 58.

The spelling of 32545781321881 in words is "thirty-two trillion, five hundred forty-five billion, seven hundred eighty-one million, three hundred twenty-one thousand, eight hundred eighty-one".