451661189227 has 2 divisors, whose sum is σ = 451661189228. Its totient is φ = 451661189226.

The previous prime is 451661189171. The next prime is 451661189237. The reversal of 451661189227 is 722981166154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 451661189227 - 2²³ = 451652800619 is a prime.

It is not a weakly prime, because it can be changed into another prime (451661189237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225830594613 + 225830594614.

It is an arithmetic number, because the mean of its divisors is an integer number (225830594614).

Almost surely, 2^451661189227 is an apocalyptic number.

451661189227 is a deficient number, since it is larger than the sum of its proper divisors (1).

451661189227 is an equidigital number, since it uses as much as digits as its factorization.

451661189227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The spelling of 451661189227 in words is "four hundred fifty-one billion, six hundred sixty-one million, one hundred eighty-nine thousand, two hundred twenty-seven".