641151264 has 96 divisors (see below), whose sum is σ = 1820448000. Its totient is φ = 196411392.

The previous prime is 641151253. The next prime is 641151271. The reversal of 641151264 is 462151146.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×641151264² = 822149886657595392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319737 + ... + 321735.

It is an arithmetic number, because the mean of its divisors is an integer number (18963000).

Almost surely, 2^641151264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641151264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910224000).

641151264 is an abundant number, since it is smaller than the sum of its proper divisors (1179296736).

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

641151264 is a wasteful number, since it uses less digits than its factorization.

641151264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282 (or 2274 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 641151264 is about 25320.9649105242. The cubic root of 641151264 is about 862.2903004587.

It can be divided in two parts, 6411 and 51264, that added together give a palindrome (57675).

The spelling of 641151264 in words is "six hundred forty-one million, one hundred fifty-one thousand, two hundred sixty-four".