2261817793 has 4 divisors (see below), whose sum is σ = 2339811540. Its totient is φ = 2183824048.

The previous prime is 2261817763. The next prime is 2261817797. The reversal of 2261817793 is 3977181622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1220593969 + 1041223824 = 34937^2 + 32268^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261817793 - 2¹³ = 2261809601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261817797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38996830 + ... + 38996887.

It is an arithmetic number, because the mean of its divisors is an integer number (584952885).

Almost surely, 2^2261817793 is an apocalyptic number.

It is an amenable number.

2261817793 is a deficient number, since it is larger than the sum of its proper divisors (77993747).

2261817793 is an equidigital number, since it uses as much as digits as its factorization.

2261817793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77993746.

The product of its digits is 254016, while the sum is 46.

The square root of 2261817793 is about 47558.5722346666. The cubic root of 2261817793 is about 1312.6608684212.

The spelling of 2261817793 in words is "two billion, two hundred sixty-one million, eight hundred seventeen thousand, seven hundred ninety-three".