2641565701 has 4 divisors (see below), whose sum is σ = 2641852332. Its totient is φ = 2641279072.

The previous prime is 2641565683. The next prime is 2641565713. The reversal of 2641565701 is 1075651462.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1075651462 = 2 ⋅537825731.

It can be written as a sum of positive squares in 2 ways, for example, as 315915076 + 2325650625 = 17774^2 + 48225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641565701 - 2⁵ = 2641565669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641565741) 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, 129016 + ... + 148081.

It is an arithmetic number, because the mean of its divisors is an integer number (660463083).

Almost surely, 2^2641565701 is an apocalyptic number.

It is an amenable number.

2641565701 is a deficient number, since it is larger than the sum of its proper divisors (286631).

2641565701 is an equidigital number, since it uses as much as digits as its factorization.

2641565701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286630.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 2641565701 is about 51396.1642634934. The cubic root of 2641565701 is about 1382.3578156571.

The spelling of 2641565701 in words is "two billion, six hundred forty-one million, five hundred sixty-five thousand, seven hundred one".