643086452670 has 32 divisors (see below), whose sum is σ = 1543734750240. Its totient is φ = 171453358080.

The previous prime is 643086452663. The next prime is 643086452737. The reversal of 643086452670 is 76254680346.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2128675 + ... + 2411934.

It is an arithmetic number, because the mean of its divisors is an integer number (48241710945).

Almost surely, 2^643086452670 is an apocalyptic number.

643086452670 is an abundant number, since it is smaller than the sum of its proper divisors (900648297570).

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

643086452670 is a wasteful number, since it uses less digits than its factorization.

643086452670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4545340.

The product of its (nonzero) digits is 5806080, while the sum is 51.

The spelling of 643086452670 in words is "six hundred forty-three billion, eighty-six million, four hundred fifty-two thousand, six hundred seventy".