641037541 has 4 divisors (see below), whose sum is σ = 648240300. Its totient is φ = 633834784.

The previous prime is 641037539. The next prime is 641037571. The reversal of 641037541 is 145730146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58828900 + 582208641 = 7670^2 + 24129^2 .

It is a cyclic number.

It is not a de Polignac number, because 641037541 - 2¹ = 641037539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641037571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3601246 + ... + 3601423.

It is an arithmetic number, because the mean of its divisors is an integer number (162060075).

Almost surely, 2^641037541 is an apocalyptic number.

It is an amenable number.

641037541 is a deficient number, since it is larger than the sum of its proper divisors (7202759).

641037541 is an equidigital number, since it uses as much as digits as its factorization.

641037541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7202758.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 641037541 is about 25318.7191816648. The cubic root of 641037541 is about 862.2393150705.

Adding to 641037541 its reverse (145730146), we get a palindrome (786767687).

The spelling of 641037541 in words is "six hundred forty-one million, thirty-seven thousand, five hundred forty-one".