1103964185809 has 9 divisors (see below), whose sum is σ = 1117513487593. Its totient is φ = 1090577255332.

The previous prime is 1103964185719. The next prime is 1103964185813. The reversal of 1103964185809 is 9085814693011.

It is a happy number.

The square root of 1103964185809 is 1050697.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-1103964185809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1103964185809.

It is not an unprimeable number, because it can be changed into a prime (1103964185899) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 87201522 + ... + 87214180.

Almost surely, 2^{1103964185809} is an apocalyptic number.

1103964185809 is the 1050697-th square number.

1103964185809 is the 525349-th centered octagonal number.

It is an amenable number.

1103964185809 is a deficient number, since it is larger than the sum of its proper divisors (13549301784).

1103964185809 is an frugal number, since it uses more digits than its factorization.

1103964185809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25484 (or 12742 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 1103964185809 in words is "one trillion, one hundred three billion, nine hundred sixty-four million, one hundred eighty-five thousand, eight hundred nine".