451645451 has 2 divisors, whose sum is σ = 451645452. Its totient is φ = 451645450.

The previous prime is 451645393. The next prime is 451645471. The reversal of 451645451 is 154546154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 451645451 - 2⁶ = 451645387 is a prime.

It is a super-2 number, since 2×451645451² = 407967226817986802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (451645471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225822725 + 225822726.

It is an arithmetic number, because the mean of its divisors is an integer number (225822726).

Almost surely, 2^451645451 is an apocalyptic number.

451645451 is a deficient number, since it is larger than the sum of its proper divisors (1).

451645451 is an equidigital number, since it uses as much as digits as its factorization.

451645451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 35.

The square root of 451645451 is about 21251.9516986088. The cubic root of 451645451 is about 767.2423145084.

The spelling of 451645451 in words is "four hundred fifty-one million, six hundred forty-five thousand, four hundred fifty-one".