641859120 has 160 divisors (see below), whose sum is σ = 2526743040. Its totient is φ = 146707200.

The previous prime is 641859109. The next prime is 641859131. The reversal of 641859120 is 21958146.

641859120 is a `hidden beast` number, since 6 + 41 + 8 + 591 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (641859109) and next prime (641859131).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6106 + ... + 36345.

It is an arithmetic number, because the mean of its divisors is an integer number (15792144).

Almost surely, 2^641859120 is an apocalyptic number.

641859120 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 641859120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263371520).

641859120 is an abundant number, since it is smaller than the sum of its proper divisors (1884883920).

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

641859120 is a wasteful number, since it uses less digits than its factorization.

641859120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42480 (or 42468 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 641859120 is about 25334.9387210627. The cubic root of 641859120 is about 862.6075177874.

The spelling of 641859120 in words is "six hundred forty-one million, eight hundred fifty-nine thousand, one hundred twenty".