2261860191 has 24 divisors (see below), whose sum is σ = 3400094880. Its totient is φ = 1447164096.

The previous prime is 2261860177. The next prime is 2261860213. The reversal of 2261860191 is 1910681622.

2261860191 is a `hidden beast` number, since 22 + 618 + 6 + 0 + 19 + 1 = 666.

It is not a de Polignac number, because 2261860191 - 2⁶ = 2261860127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261860091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17641 + ... + 69533.

It is an arithmetic number, because the mean of its divisors is an integer number (141670620).

Almost surely, 2^2261860191 is an apocalyptic number.

2261860191 is a deficient number, since it is larger than the sum of its proper divisors (1138234689).

2261860191 is a wasteful number, since it uses less digits than its factorization.

2261860191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52095 (or 52092 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2261860191 is about 47559.0179776664. The cubic root of 2261860191 is about 1312.6690703562.

The spelling of 2261860191 in words is "two billion, two hundred sixty-one million, eight hundred sixty thousand, one hundred ninety-one".