2634136643 has 4 divisors (see below), whose sum is σ = 2638534800. Its totient is φ = 2629738488.

The previous prime is 2634136639. The next prime is 2634136693. The reversal of 2634136643 is 3466314362.

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

It is a cyclic number.

It is not a de Polignac number, because 2634136643 - 2² = 2634136639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2634136597 and 2634136606.

It is not an unprimeable number, because it can be changed into a prime (2634136693) 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, 2198180 + ... + 2199377.

It is an arithmetic number, because the mean of its divisors is an integer number (659633700).

Almost surely, 2^2634136643 is an apocalyptic number.

2634136643 is a deficient number, since it is larger than the sum of its proper divisors (4398157).

2634136643 is an equidigital number, since it uses as much as digits as its factorization.

2634136643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4398156.

The product of its digits is 186624, while the sum is 38.

The square root of 2634136643 is about 51323.8408831607. The cubic root of 2634136643 is about 1381.0606987272.

The spelling of 2634136643 in words is "two billion, six hundred thirty-four million, one hundred thirty-six thousand, six hundred forty-three".