640104167 has 8 divisors (see below), whose sum is σ = 675050160. Its totient is φ = 605283840.

The previous prime is 640104137. The next prime is 640104187. The reversal of 640104167 is 761401046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640104167 - 2⁸ = 640103911 is a prime.

It is a super-2 number, since 2×640104167² = 819466689221527778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640104137) 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 7 ways as a sum of consecutive naturals, for example, 20858 + ... + 41415.

It is an arithmetic number, because the mean of its divisors is an integer number (84381270).

Almost surely, 2^640104167 is an apocalyptic number.

640104167 is a deficient number, since it is larger than the sum of its proper divisors (34945993).

640104167 is a wasteful number, since it uses less digits than its factorization.

640104167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62833.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 640104167 is about 25300.2799786880. The cubic root of 640104167 is about 861.8206278510.

The spelling of 640104167 in words is "six hundred forty million, one hundred four thousand, one hundred sixty-seven".