2261561163 has 8 divisors (see below), whose sum is σ = 3015738768. Its totient is φ = 1507545504.

The previous prime is 2261561149. The next prime is 2261561167. The reversal of 2261561163 is 3611651622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2261561163 - 2⁵ = 2261561131 is a prime.

It is a super-2 number, since 2×2261561163² = 10229317787979825138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261561167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920 + ... + 67317.

It is an arithmetic number, because the mean of its divisors is an integer number (376967346).

Almost surely, 2^2261561163 is an apocalyptic number.

2261561163 is a deficient number, since it is larger than the sum of its proper divisors (754177605).

2261561163 is a wasteful number, since it uses less digits than its factorization.

2261561163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80973.

The product of its digits is 12960, while the sum is 33.

The square root of 2261561163 is about 47555.8741166641. The cubic root of 2261561163 is about 1312.6112209060.

The spelling of 2261561163 in words is "two billion, two hundred sixty-one million, five hundred sixty-one thousand, one hundred sixty-three".