641285678 has 32 divisors (see below), whose sum is σ = 1101703680. Its totient is φ = 277113760.

The previous prime is 641285677. The next prime is 641285681. The reversal of 641285678 is 876582146.

It is a super-2 number, since 2×641285678² = 822494641615839368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641285677) 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, 80708 + ... + 88296.

It is an arithmetic number, because the mean of its divisors is an integer number (34428240).

Almost surely, 2^641285678 is an apocalyptic number.

641285678 is a deficient number, since it is larger than the sum of its proper divisors (460418002).

641285678 is a wasteful number, since it uses less digits than its factorization.

641285678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7792.

The product of its digits is 645120, while the sum is 47.

The square root of 641285678 is about 25323.6189751781. The cubic root of 641285678 is about 862.3505544613.

The spelling of 641285678 in words is "six hundred forty-one million, two hundred eighty-five thousand, six hundred seventy-eight".