644454483 has 8 divisors (see below), whose sum is σ = 904497600. Its totient is φ = 407023848.

The previous prime is 644454469. The next prime is 644454491. The reversal of 644454483 is 384454446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 644454483 - 2¹⁶ = 644388947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (644454403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5653053 + ... + 5653166.

It is an arithmetic number, because the mean of its divisors is an integer number (113062200).

Almost surely, 2^644454483 is an apocalyptic number.

644454483 is a deficient number, since it is larger than the sum of its proper divisors (260043117).

644454483 is a wasteful number, since it uses less digits than its factorization.

644454483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11306241.

The product of its digits is 737280, while the sum is 42.

The square root of 644454483 is about 25386.1080711479. The cubic root of 644454483 is about 863.7686079277.

The spelling of 644454483 in words is "six hundred forty-four million, four hundred fifty-four thousand, four hundred eighty-three".