643516054 has 16 divisors (see below), whose sum is σ = 1021409280. Its totient is φ = 303224040.

The previous prime is 643516037. The next prime is 643516117. The reversal of 643516054 is 450615346.

643516054 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×643516054² = 828225823511461832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37074 + ... + 51589.

It is an arithmetic number, because the mean of its divisors is an integer number (63838080).

Almost surely, 2^643516054 is an apocalyptic number.

643516054 is a deficient number, since it is larger than the sum of its proper divisors (377893226).

643516054 is a wasteful number, since it uses less digits than its factorization.

643516054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88875.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 643516054 is about 25367.6182169316. The cubic root of 643516054 is about 863.3491424219.

The spelling of 643516054 in words is "six hundred forty-three million, five hundred sixteen thousand, fifty-four".