2197745556 has 24 divisors (see below), whose sum is σ = 5192987520. Its totient is φ = 723308352.

The previous prime is 2197745513. The next prime is 2197745597. The reversal of 2197745556 is 6555477912.

It is a junction number, because it is equal to n+sod(n) for n = 2197745499 and 2197745508.

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 7 ways as a sum of consecutive naturals, for example, 1158201 + ... + 1160096.

It is an arithmetic number, because the mean of its divisors is an integer number (216374480).

Almost surely, 2^2197745556 is an apocalyptic number.

It is an amenable number.

2197745556 is an abundant number, since it is smaller than the sum of its proper divisors (2995241964).

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

2197745556 is a wasteful number, since it uses less digits than its factorization.

2197745556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318383 (or 2318381 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 51.

The square root of 2197745556 is about 46880.1189844906. The cubic root of 2197745556 is about 1300.1470358344.

The spelling of 2197745556 in words is "two billion, one hundred ninety-seven million, seven hundred forty-five thousand, five hundred fifty-six".