641634167 has 8 divisors (see below), whose sum is σ = 650178576. Its totient is φ = 633137152.

The previous prime is 641634137. The next prime is 641634209. The reversal of 641634167 is 761436146.

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 641634167 - 2²² = 637439863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641634167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641634127) 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 7 ways as a sum of consecutive naturals, for example, 15833 + ... + 39165.

It is an arithmetic number, because the mean of its divisors is an integer number (81272322).

Almost surely, 2^641634167 is an apocalyptic number.

641634167 is a deficient number, since it is larger than the sum of its proper divisors (8544409).

641634167 is a wasteful number, since it uses less digits than its factorization.

641634167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23697.

The product of its digits is 72576, while the sum is 38.

The square root of 641634167 is about 25330.4987515051. The cubic root of 641634167 is about 862.5067330427.

The spelling of 641634167 in words is "six hundred forty-one million, six hundred thirty-four thousand, one hundred sixty-seven".