1641601513 has 2 divisors, whose sum is σ = 1641601514. Its totient is φ = 1641601512.

The previous prime is 1641601469. The next prime is 1641601523. The reversal of 1641601513 is 3151061461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384063209 + 257538304 = 37203^2 + 16048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641601513 - 2²⁵ = 1608047081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641601523) 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, 820800756 + 820800757.

It is an arithmetic number, because the mean of its divisors is an integer number (820800757).

Almost surely, 2^1641601513 is an apocalyptic number.

It is an amenable number.

1641601513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641601513 is an equidigital number, since it uses as much as digits as its factorization.

1641601513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1641601513 is about 40516.6819100479. The cubic root of 1641601513 is about 1179.6574494047.

Adding to 1641601513 its reverse (3151061461), we get a palindrome (4792662974).

The spelling of 1641601513 in words is "one billion, six hundred forty-one million, six hundred one thousand, five hundred thirteen".