451642663 has 2 divisors, whose sum is σ = 451642664. Its totient is φ = 451642662.

The previous prime is 451642657. The next prime is 451642679. The reversal of 451642663 is 366246154.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451642663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451642063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225821331 + 225821332.

It is an arithmetic number, because the mean of its divisors is an integer number (225821332).

Almost surely, 2^451642663 is an apocalyptic number.

451642663 is a deficient number, since it is larger than the sum of its proper divisors (1).

451642663 is an equidigital number, since it uses as much as digits as its factorization.

451642663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 37.

The square root of 451642663 is about 21251.8861045320. The cubic root of 451642663 is about 767.2407357804.

The spelling of 451642663 in words is "four hundred fifty-one million, six hundred forty-two thousand, six hundred sixty-three".