451423646 has 4 divisors (see below), whose sum is σ = 677135472. Its totient is φ = 225711822.

The previous prime is 451423639. The next prime is 451423649. The reversal of 451423646 is 646324154.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451423649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112855910 + ... + 112855913.

It is an arithmetic number, because the mean of its divisors is an integer number (169283868).

Almost surely, 2^451423646 is an apocalyptic number.

451423646 is a deficient number, since it is larger than the sum of its proper divisors (225711826).

451423646 is a wasteful number, since it uses less digits than its factorization.

451423646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225711825.

The product of its digits is 69120, while the sum is 35.

The square root of 451423646 is about 21246.7325958605. The cubic root of 451423646 is about 767.1166952886.

The spelling of 451423646 in words is "four hundred fifty-one million, four hundred twenty-three thousand, six hundred forty-six".