640223485167 has 16 divisors (see below), whose sum is σ = 984212087040. Its totient is φ = 362604450432.

The previous prime is 640223485141. The next prime is 640223485177. The reversal of 640223485167 is 761584322046.

It is not a de Polignac number, because 640223485167 - 2⁶ = 640223485103 is a prime.

It is a super-2 number, since 2×640223485167² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640223485177) 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 15 ways as a sum of consecutive naturals, for example, 134895117 + ... + 134899862.

It is an arithmetic number, because the mean of its divisors is an integer number (61513255440).

Almost surely, 2^640223485167 is an apocalyptic number.

640223485167 is a deficient number, since it is larger than the sum of its proper divisors (343988601873).

640223485167 is a wasteful number, since it uses less digits than its factorization.

640223485167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269795102.

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 640223485167 in words is "six hundred forty billion, two hundred twenty-three million, four hundred eighty-five thousand, one hundred sixty-seven".