13445261643 has 8 divisors (see below), whose sum is σ = 19556744256. Its totient is φ = 8148643400.

The previous prime is 13445261617. The next prime is 13445261647. The reversal of 13445261643 is 34616254431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13445261643 - 2¹⁸ = 13444999499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13445261647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203716053 + ... + 203716118.

It is an arithmetic number, because the mean of its divisors is an integer number (2444593032).

Almost surely, 2^13445261643 is an apocalyptic number.

13445261643 is a deficient number, since it is larger than the sum of its proper divisors (6111482613).

13445261643 is a wasteful number, since it uses less digits than its factorization.

13445261643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407432185.

The product of its digits is 207360, while the sum is 39.

The spelling of 13445261643 in words is "thirteen billion, four hundred forty-five million, two hundred sixty-one thousand, six hundred forty-three".