636400464004636 has 24 divisors (see below), whose sum is σ = 1149653794222080. Its totient is φ = 307928436183600.

The previous prime is 636400464004631. The next prime is 636400464004673.

It is a happy number.

636400464004636 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×636400464004636² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636400464004631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55328020 + ... + 65833051.

It is an arithmetic number, because the mean of its divisors is an integer number (47902241425920).

Almost surely, 2^{636400464004636} is an apocalyptic number.

It is an amenable number.

636400464004636 is a deficient number, since it is larger than the sum of its proper divisors (513253330217444).

636400464004636 is a wasteful number, since it uses less digits than its factorization.

636400464004636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121203465 (or 121203463 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 52.

The spelling of 636400464004636 in words is "six hundred thirty-six trillion, four hundred billion, four hundred sixty-four million, four thousand, six hundred thirty-six".