636916055693 has 4 divisors (see below), whose sum is σ = 637349038848. Its totient is φ = 636483072540.

The previous prime is 636916055639. The next prime is 636916055701. The reversal of 636916055693 is 396550619636.

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 636916055693 - 2²⁶ = 636848946829 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 (636918055693) 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, 216489371 + ... + 216492312.

It is an arithmetic number, because the mean of its divisors is an integer number (159337259712).

Almost surely, 2^636916055693 is an apocalyptic number.

It is an amenable number.

636916055693 is a deficient number, since it is larger than the sum of its proper divisors (432983155).

636916055693 is a wasteful number, since it uses less digits than its factorization.

636916055693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432983154.

The product of its (nonzero) digits is 23619600, while the sum is 59.

The spelling of 636916055693 in words is "six hundred thirty-six billion, nine hundred sixteen million, fifty-five thousand, six hundred ninety-three".