3765561673 has 2 divisors, whose sum is σ = 3765561674. Its totient is φ = 3765561672.

The previous prime is 3765561641. The next prime is 3765561703. The reversal of 3765561673 is 3761655673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3236699664 + 528862009 = 56892^2 + 22997^2 .

It is an emirp because it is prime and its reverse (3761655673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3765561673 - 2⁵ = 3765561641 is a prime.

It is not a weakly prime, because it can be changed into another prime (3765561773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1882780836 + 1882780837.

It is an arithmetic number, because the mean of its divisors is an integer number (1882780837).

Almost surely, 2^3765561673 is an apocalyptic number.

It is an amenable number.

3765561673 is a deficient number, since it is larger than the sum of its proper divisors (1).

3765561673 is an equidigital number, since it uses as much as digits as its factorization.

3765561673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2381400, while the sum is 49.

The square root of 3765561673 is about 61364.1725520682. The cubic root of 3765561673 is about 1555.7623420519.

The spelling of 3765561673 in words is "three billion, seven hundred sixty-five million, five hundred sixty-one thousand, six hundred seventy-three".