209466830672 has 60 divisors (see below), whose sum is σ = 446800340448. Its totient is φ = 95060750400.

The previous prime is 209466830591. The next prime is 209466830689. The reversal of 209466830672 is 276038664902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1135883 + ... + 1307349.

Almost surely, 2^209466830672 is an apocalyptic number.

209466830672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209466830672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223400170224).

209466830672 is an abundant number, since it is smaller than the sum of its proper divisors (237333509776).

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

209466830672 is a wasteful number, since it uses less digits than its factorization.

209466830672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172128 (or 172111 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 209466830672 in words is "two hundred nine billion, four hundred sixty-six million, eight hundred thirty thousand, six hundred seventy-two".