3639518103989 has 2 divisors, whose sum is σ = 3639518103990. Its totient is φ = 3639518103988.

The previous prime is 3639518103889. The next prime is 3639518103997. The reversal of 3639518103989 is 9893018159363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3541058332900 + 98459771089 = 1881770^2 + 313783^2 .

It is an emirp because it is prime and its reverse (9893018159363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3639518103989 - 2²⁸ = 3639249668533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3639518103889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819759051994 + 1819759051995.

It is an arithmetic number, because the mean of its divisors is an integer number (1819759051995).

Almost surely, 2^{3639518103989} is an apocalyptic number.

It is an amenable number.

3639518103989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3639518103989 is an equidigital number, since it uses as much as digits as its factorization.

3639518103989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37791360, while the sum is 65.

The spelling of 3639518103989 in words is "three trillion, six hundred thirty-nine billion, five hundred eighteen million, one hundred three thousand, nine hundred eighty-nine".