2581761368 has 16 divisors (see below), whose sum is σ = 4842663000. Its totient is φ = 1290384576.

The previous prime is 2581761361. The next prime is 2581761379. The reversal of 2581761368 is 8631671852.

It is a super-2 number, since 2×2581761368² = 13330983522594462848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581761361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39413 + ... + 81956.

Almost surely, 2^2581761368 is an apocalyptic number.

It is an amenable number.

2581761368 is a deficient number, since it is larger than the sum of its proper divisors (2260901632).

2581761368 is a wasteful number, since it uses less digits than its factorization.

2581761368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124034 (or 124030 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 2581761368 is about 50811.0358878856. The cubic root of 2581761368 is about 1371.8460148421.

The spelling of 2581761368 in words is "two billion, five hundred eighty-one million, seven hundred sixty-one thousand, three hundred sixty-eight".