450973684571881 has 3 divisors (see below), whose sum is σ = 450973705808023. Its totient is φ = 450973663335740.

The previous prime is 450973684571857. The next prime is 450973684571887. The reversal of 450973684571881 is 188175486379054.

The square root of 450973684571881 is 21236141.

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 can be written as a sum of positive squares in only one way, i.e., 403852873480281 + 47120811091600 = 20096091^2 + 6864460^2 .

It is not a de Polignac number, because 450973684571881 - 2¹¹ = 450973684569833 is a prime.

It is a super-2 number, since 2×450973684571881² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 450973684571798 and 450973684571807.

It is not an unprimeable number, because it can be changed into a prime (450973684571887) 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, 10618071 + ... + 31854211.

Almost surely, 2^{450973684571881} is an apocalyptic number.

450973684571881 is the 21236141-st square number.

450973684571881 is the 10618071-st centered octagonal number.

It is an amenable number.

450973684571881 is a deficient number, since it is larger than the sum of its proper divisors (21236142).

450973684571881 is an frugal number, since it uses more digits than its factorization.

450973684571881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42472282 (or 21236141 counting only the distinct ones).

The product of its (nonzero) digits is 1625702400, while the sum is 76.

The spelling of 450973684571881 in words is "four hundred fifty trillion, nine hundred seventy-three billion, six hundred eighty-four million, five hundred seventy-one thousand, eight hundred eighty-one".