646400036163 has 32 divisors (see below), whose sum is σ = 1043076925440. Its totient is φ = 347595125760.

The previous prime is 646400036137. The next prime is 646400036167. The reversal of 646400036163 is 361630004646.

It is not a de Polignac number, because 646400036163 - 2⁹ = 646400035651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646400036167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2507878 + ... + 2753588.

It is an arithmetic number, because the mean of its divisors is an integer number (32596153920).

Almost surely, 2^646400036163 is an apocalyptic number.

646400036163 is a deficient number, since it is larger than the sum of its proper divisors (396676889277).

646400036163 is a wasteful number, since it uses less digits than its factorization.

646400036163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253107.

The product of its (nonzero) digits is 186624, while the sum is 39.

The spelling of 646400036163 in words is "six hundred forty-six billion, four hundred million, thirty-six thousand, one hundred sixty-three".