641026260 has 144 divisors (see below), whose sum is σ = 2232502272. Its totient is φ = 145843200.

The previous prime is 641026231. The next prime is 641026271. The reversal of 641026260 is 62620146.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 302605 + ... + 304715.

It is an arithmetic number, because the mean of its divisors is an integer number (15503488).

Almost surely, 2^641026260 is an apocalyptic number.

641026260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641026260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116251136).

641026260 is an abundant number, since it is smaller than the sum of its proper divisors (1591476012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641026260 is a wasteful number, since it uses less digits than its factorization.

641026260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374 (or 2369 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 641026260 is about 25318.4964008529. The cubic root of 641026260 is about 862.2342571354.

The spelling of 641026260 in words is "six hundred forty-one million, twenty-six thousand, two hundred sixty".