641145340 has 48 divisors (see below), whose sum is σ = 1519469280. Its totient is φ = 225102080.

The previous prime is 641145299. The next prime is 641145343. The reversal of 641145340 is 43541146.

It is a super-2 number, since 2×641145340² = 822134694007431200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641145299 and 641145308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641145343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43867 + ... + 56626.

It is an arithmetic number, because the mean of its divisors is an integer number (31655610).

Almost surely, 2^641145340 is an apocalyptic number.

It is an amenable number.

641145340 is an abundant number, since it is smaller than the sum of its proper divisors (878323940).

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

641145340 is a wasteful number, since it uses less digits than its factorization.

641145340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100542 (or 100540 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 641145340 is about 25320.8479320895. The cubic root of 641145340 is about 862.2876447029.

Adding to 641145340 its reverse (43541146), we get a palindrome (684686486).

The spelling of 641145340 in words is "six hundred forty-one million, one hundred forty-five thousand, three hundred forty".