13445906565 has 32 divisors (see below), whose sum is σ = 26478095616. Its totient is φ = 5673876480.

The previous prime is 13445906561. The next prime is 13445906623. The reversal of 13445906565 is 56560954431.

It is not a de Polignac number, because 13445906565 - 2² = 13445906561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445906561) 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 31 ways as a sum of consecutive naturals, for example, 4923876 + ... + 4926605.

It is an arithmetic number, because the mean of its divisors is an integer number (827440488).

Almost surely, 2^13445906565 is an apocalyptic number.

13445906565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13445906565 is a deficient number, since it is larger than the sum of its proper divisors (13032189051).

13445906565 is a wasteful number, since it uses less digits than its factorization.

13445906565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9850509.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 13445906565 in words is "thirteen billion, four hundred forty-five million, nine hundred six thousand, five hundred sixty-five".