2561968192 has 28 divisors (see below), whose sum is σ = 5810178880. Its totient is φ = 1097986176.

The previous prime is 2561968181. The next prime is 2561968207. The reversal of 2561968192 is 2918691652.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2858892 + ... + 2859787.

Almost surely, 2^2561968192 is an apocalyptic number.

It is an amenable number.

2561968192 is an abundant number, since it is smaller than the sum of its proper divisors (3248210688).

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

2561968192 is an equidigital number, since it uses as much as digits as its factorization.

2561968192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718698 (or 5718688 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 2561968192 is about 50615.8887307138. Note that the first 3 decimals coincide. The cubic root of 2561968192 is about 1368.3312468036.

The spelling of 2561968192 in words is "two billion, five hundred sixty-one million, nine hundred sixty-eight thousand, one hundred ninety-two".