641608467 has 16 divisors (see below), whose sum is σ = 879796512. Its totient is φ = 415662080.

The previous prime is 641608447. The next prime is 641608493. The reversal of 641608467 is 764806146.

641608467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 641608467 - 2⁶ = 641608403 is a prime.

It is a super-2 number, since 2×641608467² = 823322849852180178, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (641608427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21463 + ... + 41759.

It is an arithmetic number, because the mean of its divisors is an integer number (54987282).

Almost surely, 2^641608467 is an apocalyptic number.

641608467 is a deficient number, since it is larger than the sum of its proper divisors (238188045).

641608467 is a wasteful number, since it uses less digits than its factorization.

641608467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20598.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 641608467 is about 25329.9914528213. The cubic root of 641608467 is about 862.4952172808.

It can be divided in two parts, 64160 and 8467, that added together give a palindrome (72627).

The spelling of 641608467 in words is "six hundred forty-one million, six hundred eight thousand, four hundred sixty-seven".