1641340541 has 4 divisors (see below), whose sum is σ = 1663824732. Its totient is φ = 1618856352.

The previous prime is 1641340511. The next prime is 1641340553. The reversal of 1641340541 is 1450431461.

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 317908900 + 1323431641 = 17830^2 + 36379^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641340541 - 2¹⁰ = 1641339517 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 (1641340511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11241986 + ... + 11242131.

It is an arithmetic number, because the mean of its divisors is an integer number (415956183).

Almost surely, 2^1641340541 is an apocalyptic number.

It is an amenable number.

1641340541 is a deficient number, since it is larger than the sum of its proper divisors (22484191).

1641340541 is an equidigital number, since it uses as much as digits as its factorization.

1641340541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22484190.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1641340541 is about 40513.4612320399. The cubic root of 1641340541 is about 1179.5949344609.

The spelling of 1641340541 in words is "one billion, six hundred forty-one million, three hundred forty thousand, five hundred forty-one".