643074453 has 48 divisors (see below), whose sum is σ = 1143192960. Its totient is φ = 339959808.

The previous prime is 643074451. The next prime is 643074461. The reversal of 643074453 is 354470346.

It is a happy number.

643074453 is a `hidden beast` number, since 643 + 0 + 7 + 4 + 4 + 5 + 3 = 666.

It is not a de Polignac number, because 643074453 - 2¹ = 643074451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643074451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58101 + ... + 68277.

It is an arithmetic number, because the mean of its divisors is an integer number (23816520).

Almost surely, 2^643074453 is an apocalyptic number.

643074453 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

643074453 is a deficient number, since it is larger than the sum of its proper divisors (500118507).

643074453 is a wasteful number, since it uses less digits than its factorization.

643074453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10266 (or 10263 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 36.

The square root of 643074453 is about 25358.9126935679. The cubic root of 643074453 is about 863.1516114328.

The spelling of 643074453 in words is "six hundred forty-three million, seventy-four thousand, four hundred fifty-three".