1641074940541 has 4 divisors (see below), whose sum is σ = 1641119941692. Its totient is φ = 1641029939392.

The previous prime is 1641074940521. The next prime is 1641074940649. The reversal of 1641074940541 is 1450494701461.

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 1606229251641 + 34845688900 = 1267371^2 + 186670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641074940541 - 2¹⁹ = 1641074416253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1641074940491 and 1641074940500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641074940511) 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, 22445830 + ... + 22518823.

It is an arithmetic number, because the mean of its divisors is an integer number (410279985423).

Almost surely, 2^{1641074940541} is an apocalyptic number.

It is an amenable number.

1641074940541 is a deficient number, since it is larger than the sum of its proper divisors (45001151).

1641074940541 is an equidigital number, since it uses as much as digits as its factorization.

1641074940541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45001150.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 1641074940541 in words is "one trillion, six hundred forty-one billion, seventy-four million, nine hundred forty thousand, five hundred forty-one".