1642010561 has 2 divisors, whose sum is σ = 1642010562. Its totient is φ = 1642010560.

The previous prime is 1642010519. The next prime is 1642010639. The reversal of 1642010561 is 1650102461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1608010000 + 34000561 = 40100^2 + 5831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642010561 - 2³⁰ = 568268737 is a prime.

It is a super-3 number, since 3×1642010561³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1642010561.

It is not a weakly prime, because it can be changed into another prime (1642015561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821005280 + 821005281.

It is an arithmetic number, because the mean of its divisors is an integer number (821005281).

Almost surely, 2^1642010561 is an apocalyptic number.

It is an amenable number.

1642010561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642010561 is an equidigital number, since it uses as much as digits as its factorization.

1642010561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1642010561 is about 40521.7294917184. The cubic root of 1642010561 is about 1179.7554221147.

The spelling of 1642010561 in words is "one billion, six hundred forty-two million, ten thousand, five hundred sixty-one".