643451053 has 16 divisors (see below), whose sum is σ = 759141504. Its totient is φ = 533856960.

The previous prime is 643451047. The next prime is 643451063. The reversal of 643451053 is 350154346.

It is not a de Polignac number, because 643451053 - 2⁵ = 643451021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643451033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44718 + ... + 57328.

It is an arithmetic number, because the mean of its divisors is an integer number (47446344).

Almost surely, 2^643451053 is an apocalyptic number.

It is an amenable number.

643451053 is a deficient number, since it is larger than the sum of its proper divisors (115690451).

643451053 is a wasteful number, since it uses less digits than its factorization.

643451053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12852.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 643451053 is about 25366.3370039902. The cubic root of 643451053 is about 863.3200727264.

The spelling of 643451053 in words is "six hundred forty-three million, four hundred fifty-one thousand, fifty-three".