641531262 has 16 divisors (see below), whose sum is σ = 1283498640. Its totient is φ = 213771072.

The previous prime is 641531251. The next prime is 641531269. The reversal of 641531262 is 262135146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641531269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2818 + ... + 35930.

It is an arithmetic number, because the mean of its divisors is an integer number (80218665).

Almost surely, 2^641531262 is an apocalyptic number.

641531262 is an abundant number, since it is smaller than the sum of its proper divisors (641967378).

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

641531262 is a wasteful number, since it uses less digits than its factorization.

641531262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36347.

The product of its digits is 8640, while the sum is 30.

The square root of 641531262 is about 25328.4674230400. The cubic root of 641531262 is about 862.4606210965.

The spelling of 641531262 in words is "six hundred forty-one million, five hundred thirty-one thousand, two hundred sixty-two".