641571120 has 120 divisors (see below), whose sum is σ = 2212934256. Its totient is φ = 166454784.

The previous prime is 641571113. The next prime is 641571127. The reversal of 641571120 is 21175146.

It is a happy number.

641571120 is a `hidden beast` number, since 641 + 5 + 7 + 1 + 12 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (641571113) and next prime (641571127).

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×641571120² = 823227004036108800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641571127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14599 + ... + 38681.

Almost surely, 2^641571120 is an apocalyptic number.

641571120 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 641571120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106467128).

641571120 is an abundant number, since it is smaller than the sum of its proper divisors (1571363136).

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

641571120 is a wasteful number, since it uses less digits than its factorization.

641571120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24139 (or 24130 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 641571120 is about 25329.2542330010. The cubic root of 641571120 is about 862.4784821349.

The spelling of 641571120 in words is "six hundred forty-one million, five hundred seventy-one thousand, one hundred twenty".