643451056614 has 48 divisors (see below), whose sum is σ = 1402451893440. Its totient is φ = 213208012080.

The previous prime is 643451056609. The next prime is 643451056643. The reversal of 643451056614 is 416650154346.

643451056614 is a `hidden beast` number, since 6 + 4 + 34 + 51 + 0 + 566 + 1 + 4 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 643451056614.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3038517 + ... + 3243375.

It is an arithmetic number, because the mean of its divisors is an integer number (29217747780).

Almost surely, 2^643451056614 is an apocalyptic number.

643451056614 is an abundant number, since it is smaller than the sum of its proper divisors (759000836826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643451056614 is a wasteful number, since it uses less digits than its factorization.

643451056614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205905 (or 205902 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 643451056614 in words is "six hundred forty-three billion, four hundred fifty-one million, fifty-six thousand, six hundred fourteen".