1641340553 has 2 divisors, whose sum is σ = 1641340554. Its totient is φ = 1641340552.

The previous prime is 1641340511. The next prime is 1641340699. The reversal of 1641340553 is 3550431461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575454864 + 65885689 = 39692^2 + 8117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641340553 - 2¹² = 1641336457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641340453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820670276 + 820670277.

It is an arithmetic number, because the mean of its divisors is an integer number (820670277).

Almost surely, 2^1641340553 is an apocalyptic number.

It is an amenable number.

1641340553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641340553 is an equidigital number, since it uses as much as digits as its factorization.

1641340553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1641340553 is about 40513.4613801388. The cubic root of 1641340553 is about 1179.5949373356.

The spelling of 1641340553 in words is "one billion, six hundred forty-one million, three hundred forty thousand, five hundred fifty-three".