636452849 has 4 divisors (see below), whose sum is σ = 664124736. Its totient is φ = 608780964.

The previous prime is 636452837. The next prime is 636452863. The reversal of 636452849 is 948254636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 636452849 - 2²⁸ = 368017393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636452809) 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, 13835909 + ... + 13835954.

It is an arithmetic number, because the mean of its divisors is an integer number (166031184).

Almost surely, 2^636452849 is an apocalyptic number.

It is an amenable number.

636452849 is a deficient number, since it is larger than the sum of its proper divisors (27671887).

636452849 is a wasteful number, since it uses less digits than its factorization.

636452849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27671886.

The product of its digits is 1244160, while the sum is 47.

The square root of 636452849 is about 25228.0171436441. The cubic root of 636452849 is about 860.1788203057.

The spelling of 636452849 in words is "six hundred thirty-six million, four hundred fifty-two thousand, eight hundred forty-nine".