1641610273 has 2 divisors, whose sum is σ = 1641610274. Its totient is φ = 1641610272.

The previous prime is 1641610261. The next prime is 1641610291. The reversal of 1641610273 is 3720161461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1641222144 + 388129 = 40512^2 + 623^2 .

It is an emirp because it is prime and its reverse (3720161461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1641610273 - 2¹⁷ = 1641479201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641610973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820805136 + 820805137.

It is an arithmetic number, because the mean of its divisors is an integer number (820805137).

Almost surely, 2^1641610273 is an apocalyptic number.

It is an amenable number.

1641610273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641610273 is an equidigital number, since it uses as much as digits as its factorization.

1641610273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1641610273 is about 40516.7900135240. The cubic root of 1641610273 is about 1179.6595477176.

The spelling of 1641610273 in words is "one billion, six hundred forty-one million, six hundred ten thousand, two hundred seventy-three".