209488912464 has 80 divisors (see below), whose sum is σ = 584883440064. Its totient is φ = 64228684800.

The previous prime is 209488912411. The next prime is 209488912583. The reversal of 209488912464 is 464219884902.

It is a happy number.

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, 422022 + ... + 772709.

Almost surely, 2^209488912464 is an apocalyptic number.

209488912464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

209488912464 is an abundant number, since it is smaller than the sum of its proper divisors (375394527600).

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

209488912464 is a wasteful number, since it uses less digits than its factorization.

209488912464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195036 (or 1195030 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 209488912464 in words is "two hundred nine billion, four hundred eighty-eight million, nine hundred twelve thousand, four hundred sixty-four".