2261880649 has 4 divisors (see below), whose sum is σ = 2585006464. Its totient is φ = 1938754836.

The previous prime is 2261880641. The next prime is 2261880653. The reversal of 2261880649 is 9460881622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2261880649 - 2³ = 2261880641 is a prime.

It is a super-2 number, since 2×2261880649² = 10232208140641322402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2261880599 and 2261880608.

It is not an unprimeable number, because it can be changed into a prime (2261880641) 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, 161562897 + ... + 161562910.

It is an arithmetic number, because the mean of its divisors is an integer number (646251616).

Almost surely, 2^2261880649 is an apocalyptic number.

It is an amenable number.

2261880649 is a deficient number, since it is larger than the sum of its proper divisors (323125815).

2261880649 is an equidigital number, since it uses as much as digits as its factorization.

2261880649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323125814.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 2261880649 is about 47559.2330573150. The cubic root of 2261880649 is about 1312.6730279399.

The spelling of 2261880649 in words is "two billion, two hundred sixty-one million, eight hundred eighty thousand, six hundred forty-nine".