2209758506648 has 128 divisors (see below), whose sum is σ = 5194711941120. Its totient is φ = 856118108160.

The previous prime is 2209758506647. The next prime is 2209758506731. The reversal of 2209758506648 is 8466058579022.

It is a happy number.

It is a super-4 number, since 4×2209758506648⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209758506647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79493840 + ... + 79521632.

It is an arithmetic number, because the mean of its divisors is an integer number (40583687040).

Almost surely, 2^{2209758506648} is an apocalyptic number.

2209758506648 is a gapful number since it is divisible by the number (28) 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 2209758506648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597355970560).

2209758506648 is an abundant number, since it is smaller than the sum of its proper divisors (2984953434472).

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

2209758506648 is a wasteful number, since it uses less digits than its factorization.

2209758506648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28537 (or 28533 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 62.

The spelling of 2209758506648 in words is "two trillion, two hundred nine billion, seven hundred fifty-eight million, five hundred six thousand, six hundred forty-eight".