636064064428 has 24 divisors (see below), whose sum is σ = 1198758800288. Its totient is φ = 293562475776.

The previous prime is 636064064413. The next prime is 636064064443. The reversal of 636064064428 is 824460460636.

It is an interprime number because it is at equal distance from previous prime (636064064413) and next prime (636064064443).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4173700 + ... + 4323412.

Almost surely, 2^636064064428 is an apocalyptic number.

It is an amenable number.

636064064428 is a deficient number, since it is larger than the sum of its proper divisors (562694735860).

636064064428 is a wasteful number, since it uses less digits than its factorization.

636064064428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231433 (or 231431 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 636064064428 in words is "six hundred thirty-six billion, sixty-four million, sixty-four thousand, four hundred twenty-eight".