5511972322081 has 3 divisors (see below), whose sum is σ = 5511974669841. Its totient is φ = 5511969974322.

The previous prime is 5511972322007. The next prime is 5511972322127. The reversal of 5511972322081 is 1802232791155.

The square root of 5511972322081 is 2347759.

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 not a de Polignac number, because 5511972322081 - 2⁷ = 5511972321953 is a prime.

It is a super-2 number, since 2×5511972322081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5511972322001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1173880 + ... + 3521638.

It is an arithmetic number, because the mean of its divisors is an integer number (1837324889947).

Almost surely, 2^{5511972322081} is an apocalyptic number.

5511972322081 is the 2347759-th square number.

5511972322081 is the 1173880-th centered octagonal number.

It is an amenable number.

5511972322081 is a deficient number, since it is larger than the sum of its proper divisors (2347760).

5511972322081 is an frugal number, since it uses more digits than its factorization.

5511972322081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695518 (or 2347759 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 5511972322081 in words is "five trillion, five hundred eleven billion, nine hundred seventy-two million, three hundred twenty-two thousand, eighty-one".