1641441541 has 2 divisors, whose sum is σ = 1641441542. Its totient is φ = 1641441540.

The previous prime is 1641441467. The next prime is 1641441547. The reversal of 1641441541 is 1451441461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1278348516 + 363093025 = 35754^2 + 19055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641441541 - 2²⁹ = 1104570629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641441547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820720770 + 820720771.

It is an arithmetic number, because the mean of its divisors is an integer number (820720771).

It is a self-describing number.

Almost surely, 2^1641441541 is an apocalyptic number.

It is an amenable number.

1641441541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641441541 is an equidigital number, since it uses as much as digits as its factorization.

1641441541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 31.

The square root of 1641441541 is about 40514.7077121383. The cubic root of 1641441541 is about 1179.6191294490.

The spelling of 1641441541 in words is "one billion, six hundred forty-one million, four hundred forty-one thousand, five hundred forty-one".