13621144459 has 4 divisors (see below), whose sum is σ = 14668924816. Its totient is φ = 12573364104.

The previous prime is 13621144423. The next prime is 13621144469. The reversal of 13621144459 is 95444112631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13621144459 - 2¹³ = 13621136267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13621144469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523890159 + ... + 523890184.

It is an arithmetic number, because the mean of its divisors is an integer number (3667231204).

Almost surely, 2^13621144459 is an apocalyptic number.

13621144459 is a deficient number, since it is larger than the sum of its proper divisors (1047780357).

13621144459 is a wasteful number, since it uses less digits than its factorization.

13621144459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047780356.

The product of its digits is 103680, while the sum is 40.

The spelling of 13621144459 in words is "thirteen billion, six hundred twenty-one million, one hundred forty-four thousand, four hundred fifty-nine".