1365264653 has 4 divisors (see below), whose sum is σ = 1365445728. Its totient is φ = 1365083580.

The previous prime is 1365264643. The next prime is 1365264673. The reversal of 1365264653 is 3564625631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3564625631 = 7 ⋅509232233.

It is a cyclic number.

It is not a de Polignac number, because 1365264653 - 2¹² = 1365260557 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 1365264653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365264623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78713 + ... + 94478.

It is an arithmetic number, because the mean of its divisors is an integer number (341361432).

Almost surely, 2^1365264653 is an apocalyptic number.

It is an amenable number.

1365264653 is a deficient number, since it is larger than the sum of its proper divisors (181075).

1365264653 is an equidigital number, since it uses as much as digits as its factorization.

1365264653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181074.

The product of its digits is 388800, while the sum is 41.

The square root of 1365264653 is about 36949.4878584264. The cubic root of 1365264653 is about 1109.3594369759.

The spelling of 1365264653 in words is "one billion, three hundred sixty-five million, two hundred sixty-four thousand, six hundred fifty-three".