2561256272 has 20 divisors (see below), whose sum is σ = 5032329696. Its totient is φ = 1262590560.

The previous prime is 2561256253. The next prime is 2561256317. The reversal of 2561256272 is 2726521652.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1126178 + ... + 1128449.

Almost surely, 2^2561256272 is an apocalyptic number.

It is an amenable number.

2561256272 is a deficient number, since it is larger than the sum of its proper divisors (2471073424).

2561256272 is a wasteful number, since it uses less digits than its factorization.

2561256272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254706 (or 2254700 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 2561256272 is about 50608.8556677584. The cubic root of 2561256272 is about 1368.2044910500.

The spelling of 2561256272 in words is "two billion, five hundred sixty-one million, two hundred fifty-six thousand, two hundred seventy-two".