453945681 has 32 divisors (see below), whose sum is σ = 775802880. Its totient is φ = 256961808.

The previous prime is 453945677. The next prime is 453945691. The reversal of 453945681 is 186549354.

It is not a de Polignac number, because 453945681 - 2² = 453945677 is a prime.

It is a super-2 number, since 2×453945681² = 412133362597107522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (453945691) 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, 9000 + ... + 31446.

It is an arithmetic number, because the mean of its divisors is an integer number (24243840).

Almost surely, 2^453945681 is an apocalyptic number.

It is an amenable number.

453945681 is a deficient number, since it is larger than the sum of its proper divisors (321857199).

453945681 is a wasteful number, since it uses less digits than its factorization.

453945681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22570 (or 22564 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 453945681 is about 21306.0010560405. The cubic root of 453945681 is about 768.5426310397.

Subtracting from 453945681 its sum of digits (45), we obtain a square (453945636 = 21306²).

The spelling of 453945681 in words is "four hundred fifty-three million, nine hundred forty-five thousand, six hundred eighty-one".