2194753565 has 4 divisors (see below), whose sum is σ = 2633704284. Its totient is φ = 1755802848.

The previous prime is 2194753559. The next prime is 2194753577. The reversal of 2194753565 is 5653574912.

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 1244819524 + 949934041 = 35282^2 + 30821^2 .

It is a cyclic number.

It is not a de Polignac number, because 2194753565 - 2⁴ = 2194753549 is a prime.

It is a super-2 number, since 2×2194753565² = 9633886422160418450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219475352 + ... + 219475361.

It is an arithmetic number, because the mean of its divisors is an integer number (658426071).

Almost surely, 2^2194753565 is an apocalyptic number.

It is an amenable number.

2194753565 is a deficient number, since it is larger than the sum of its proper divisors (438950719).

2194753565 is an equidigital number, since it uses as much as digits as its factorization.

2194753565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438950718.

The product of its digits is 1134000, while the sum is 47.

The square root of 2194753565 is about 46848.1970304088. The cubic root of 2194753565 is about 1299.5567650698.

The spelling of 2194753565 in words is "two billion, one hundred ninety-four million, seven hundred fifty-three thousand, five hundred sixty-five".