209653989996 has 48 divisors (see below), whose sum is σ = 534494878848. Its totient is φ = 63432681600.

The previous prime is 209653989983. The next prime is 209653990043. The reversal of 209653989996 is 699989356902.

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, 1150185 + ... + 1319936.

It is an arithmetic number, because the mean of its divisors is an integer number (11135309976).

Almost surely, 2^209653989996 is an apocalyptic number.

It is an amenable number.

209653989996 is an abundant number, since it is smaller than the sum of its proper divisors (324840888852).

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

209653989996 is a wasteful number, since it uses less digits than its factorization.

209653989996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470782 (or 2470780 counting only the distinct ones).

The product of its (nonzero) digits is 510183360, while the sum is 75.

The spelling of 209653989996 in words is "two hundred nine billion, six hundred fifty-three million, nine hundred eighty-nine thousand, nine hundred ninety-six".