1365013561 has 12 divisors (see below), whose sum is σ = 1444703232. Its totient is φ = 1289521944.

The previous prime is 1365013541. The next prime is 1365013597. The reversal of 1365013561 is 1653105631.

It is not a de Polignac number, because 1365013561 - 2²⁷ = 1230795833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1365013501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127336 + ... + 137638.

It is an arithmetic number, because the mean of its divisors is an integer number (120391936).

Almost surely, 2^1365013561 is an apocalyptic number.

It is an amenable number.

1365013561 is a deficient number, since it is larger than the sum of its proper divisors (79689671).

1365013561 is a wasteful number, since it uses less digits than its factorization.

1365013561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10708 (or 10689 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 1365013561 is about 36946.0899284349. The cubic root of 1365013561 is about 1109.2914237016.

The spelling of 1365013561 in words is "one billion, three hundred sixty-five million, thirteen thousand, five hundred sixty-one".