643513560644100 has 72 divisors (see below), whose sum is σ = 1861937213301088. Its totient is φ = 171600115910400.

The previous prime is 643513560644083. The next prime is 643513560644111. The reversal of 643513560644100 is 1446065315346.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 643513560644100.

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, 7127794 + ... + 36576393.

Almost surely, 2^{643513560644100} is an apocalyptic number.

643513560644100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

643513560644100 is an abundant number, since it is smaller than the sum of its proper divisors (1218423652656988).

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

643513560644100 is a wasteful number, since it uses less digits than its factorization.

643513560644100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43753285 (or 43753278 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 643513560644100 in words is "six hundred forty-three trillion, five hundred thirteen billion, five hundred sixty million, six hundred forty-four thousand, one hundred".