209144956448448 has 84 divisors (see below), whose sum is σ = 599548994481528. Its totient is φ = 69706526423040.

The previous prime is 209144956448429. The next prime is 209144956448501. The reversal of 209144956448448 is 844844659441902.

209144956448448 is a `hidden beast` number, since 2 + 0 + 9 + 1 + 4 + 49 + 5 + 64 + 484 + 48 = 666.

It is a super-2 number, since 2×209144956448448² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 17276713 + ... + 26772648.

It is an arithmetic number, because the mean of its divisors is an integer number (7137488029542).

Almost surely, 2^{209144956448448} is an apocalyptic number.

It is an amenable number.

209144956448448 is an abundant number, since it is smaller than the sum of its proper divisors (390404038033080).

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

209144956448448 is a wasteful number, since it uses less digits than its factorization.

209144956448448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44057622 (or 44057609 counting only the distinct ones).

The product of its (nonzero) digits is 1274019840, while the sum is 72.

The spelling of 209144956448448 in words is "two hundred nine trillion, one hundred forty-four billion, nine hundred fifty-six million, four hundred forty-eight thousand, four hundred forty-eight".