2661144245 has 8 divisors (see below), whose sum is σ = 3197267640. Its totient is φ = 2126319040.

The previous prime is 2661144223. The next prime is 2661144247. The reversal of 2661144245 is 5424411662.

It can be written as a sum of positive squares in 4 ways, for example, as 373339684 + 2287804561 = 19322^2 + 47831^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-2661144245 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661144247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320030 + ... + 328239.

It is an arithmetic number, because the mean of its divisors is an integer number (399658455).

Almost surely, 2^2661144245 is an apocalyptic number.

It is an amenable number.

2661144245 is a deficient number, since it is larger than the sum of its proper divisors (536123395).

2661144245 is an equidigital number, since it uses as much as digits as its factorization.

2661144245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649095.

The product of its digits is 46080, while the sum is 35.

The square root of 2661144245 is about 51586.2796196818. The cubic root of 2661144245 is about 1385.7646288109.

The spelling of 2661144245 in words is "two billion, six hundred sixty-one million, one hundred forty-four thousand, two hundred forty-five".