2261617663 has 2 divisors, whose sum is σ = 2261617664. Its totient is φ = 2261617662.

The previous prime is 2261617649. The next prime is 2261617703. The reversal of 2261617663 is 3667161622.

It is an a-pointer prime, because the next prime (2261617703) can be obtained adding 2261617663 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2261617663 is a prime.

It is a super-2 number, since 2×2261617663² = 10229828907187163138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261617613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130808831 + 1130808832.

It is an arithmetic number, because the mean of its divisors is an integer number (1130808832).

Almost surely, 2^2261617663 is an apocalyptic number.

2261617663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261617663 is an equidigital number, since it uses as much as digits as its factorization.

2261617663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 2261617663 is about 47556.4681510307. The cubic root of 2261617663 is about 1312.6221516910.

The spelling of 2261617663 in words is "two billion, two hundred sixty-one million, six hundred seventeen thousand, six hundred sixty-three".