3687444561919 has 2 divisors, whose sum is σ = 3687444561920. Its totient is φ = 3687444561918.

The previous prime is 3687444561893. The next prime is 3687444561929. The reversal of 3687444561919 is 9191654447863.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3687444561919 - 2⁷ = 3687444561791 is a prime.

It is a super-2 number, since 2×3687444561919² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3687444561929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843722280959 + 1843722280960.

It is an arithmetic number, because the mean of its divisors is an integer number (1843722280960).

Almost surely, 2^{3687444561919} is an apocalyptic number.

3687444561919 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687444561919 is an equidigital number, since it uses as much as digits as its factorization.

3687444561919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156764160, while the sum is 67.

The spelling of 3687444561919 in words is "three trillion, six hundred eighty-seven billion, four hundred forty-four million, five hundred sixty-one thousand, nine hundred nineteen".