2261565616 has 20 divisors (see below), whose sum is σ = 4383415872. Its totient is φ = 1130361536.

The previous prime is 2261565613. The next prime is 2261565629. The reversal of 2261565616 is 6165651622.

It is a super-2 number, since 2×2261565616² = 10229358070946918912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261565613) 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, 20481 + ... + 70303.

Almost surely, 2^2261565616 is an apocalyptic number.

It is an amenable number.

2261565616 is a deficient number, since it is larger than the sum of its proper divisors (2121850256).

2261565616 is a wasteful number, since it uses less digits than its factorization.

2261565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52668 (or 52662 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 2261565616 is about 47555.9209352526. The cubic root of 2261565616 is about 1312.6120824132.

The spelling of 2261565616 in words is "two billion, two hundred sixty-one million, five hundred sixty-five thousand, six hundred sixteen".