2209397497944 has 576 divisors, whose sum is σ = 7115777856000. Its totient is φ = 569602575360.

The previous prime is 2209397497943. The next prime is 2209397497969. The reversal of 2209397497944 is 4497947939022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209397497943) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1711383939 + ... + 1711385229.

It is an arithmetic number, because the mean of its divisors is an integer number (12353781000).

Almost surely, 2^{2209397497944} is an apocalyptic number.

2209397497944 is a gapful number since it is divisible by the number (24) 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 2209397497944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3557888928000).

2209397497944 is an abundant number, since it is smaller than the sum of its proper divisors (4906380358056).

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

2209397497944 is a wasteful number, since it uses less digits than its factorization.

2209397497944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 69.

The spelling of 2209397497944 in words is "two trillion, two hundred nine billion, three hundred ninety-seven million, four hundred ninety-seven thousand, nine hundred forty-four".