636340848873 has 4 divisors (see below), whose sum is σ = 848454465168. Its totient is φ = 424227232580.

The previous prime is 636340848833. The next prime is 636340848887. The reversal of 636340848873 is 378848043636.

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 636340848873 - 2¹⁸ = 636340586729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (636340848833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106056808143 + ... + 106056808148.

It is an arithmetic number, because the mean of its divisors is an integer number (212113616292).

Almost surely, 2^636340848873 is an apocalyptic number.

It is an amenable number.

636340848873 is a deficient number, since it is larger than the sum of its proper divisors (212113616295).

636340848873 is a wasteful number, since it uses less digits than its factorization.

636340848873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212113616294.

The product of its (nonzero) digits is 55738368, while the sum is 60.

The spelling of 636340848873 in words is "six hundred thirty-six billion, three hundred forty million, eight hundred forty-eight thousand, eight hundred seventy-three".