2636634949 has 4 divisors (see below), whose sum is σ = 2839453036. Its totient is φ = 2433816864.

The previous prime is 2636634943. The next prime is 2636634961. The reversal of 2636634949 is 9494366362.

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 1310946849 + 1325688100 = 36207^2 + 36410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2636634949 - 2⁷ = 2636634821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2636634896 and 2636634905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2636634943) 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, 101409024 + ... + 101409049.

It is an arithmetic number, because the mean of its divisors is an integer number (709863259).

Almost surely, 2^2636634949 is an apocalyptic number.

It is an amenable number.

2636634949 is a deficient number, since it is larger than the sum of its proper divisors (202818087).

2636634949 is a wasteful number, since it uses less digits than its factorization.

2636634949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202818086.

The product of its digits is 5038848, while the sum is 52.

The square root of 2636634949 is about 51348.1737649938. The cubic root of 2636634949 is about 1381.4971759584.

The spelling of 2636634949 in words is "two billion, six hundred thirty-six million, six hundred thirty-four thousand, nine hundred forty-nine".