643451054 has 32 divisors (see below), whose sum is σ = 1060218720. Its totient is φ = 291658752.

The previous prime is 643451047. The next prime is 643451063. The reversal of 643451054 is 450154346.

It is a self number, because there is not a number n which added to its sum of digits gives 643451054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103712 + ... + 109740.

It is an arithmetic number, because the mean of its divisors is an integer number (33131835).

Almost surely, 2^643451054 is an apocalyptic number.

643451054 is a deficient number, since it is larger than the sum of its proper divisors (416767666).

643451054 is a wasteful number, since it uses less digits than its factorization.

643451054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6164.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 643451054 is about 25366.3370237013. The cubic root of 643451054 is about 863.3200731736.

The spelling of 643451054 in words is "six hundred forty-three million, four hundred fifty-one thousand, fifty-four".