641094272 has 128 divisors (see below), whose sum is σ = 1640943360. Its totient is φ = 242491392.

The previous prime is 641094269. The next prime is 641094277. The reversal of 641094272 is 272490146.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×641094272² = 822003731182419968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (641094277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266708 + ... + 269100.

It is an arithmetic number, because the mean of its divisors is an integer number (12819870).

Almost surely, 2^641094272 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 641094272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820471680).

641094272 is an abundant number, since it is smaller than the sum of its proper divisors (999849088).

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

641094272 is a wasteful number, since it uses less digits than its factorization.

641094272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2450 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 641094272 is about 25319.8394939620. The cubic root of 641094272 is about 862.2647500112.

The spelling of 641094272 in words is "six hundred forty-one million, ninety-four thousand, two hundred seventy-two".