209742198144 has 48 divisors (see below), whose sum is σ = 557151553260. Its totient is φ = 69911074560.

The previous prime is 209742198119. The next prime is 209742198209. The reversal of 209742198144 is 441891247902.

209742198144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8962779 + ... + 8986149.

Almost surely, 2^209742198144 is an apocalyptic number.

209742198144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

209742198144 is an abundant number, since it is smaller than the sum of its proper divisors (347409355116).

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

209742198144 is an frugal number, since it uses more digits than its factorization.

209742198144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46759 (or 23376 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 209742198144 in words is "two hundred nine billion, seven hundred forty-two million, one hundred ninety-eight thousand, one hundred forty-four".