13456621447 has 4 divisors (see below), whose sum is σ = 13534405560. Its totient is φ = 13378837336.

The previous prime is 13456621433. The next prime is 13456621463. The reversal of 13456621447 is 74412665431.

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 13456621447 - 2³¹ = 11309137799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11456621447) 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, 38891797 + ... + 38892142.

It is an arithmetic number, because the mean of its divisors is an integer number (3383601390).

Almost surely, 2^13456621447 is an apocalyptic number.

13456621447 is a deficient number, since it is larger than the sum of its proper divisors (77784113).

13456621447 is an equidigital number, since it uses as much as digits as its factorization.

13456621447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77784112.

The product of its digits is 483840, while the sum is 43.

The spelling of 13456621447 in words is "thirteen billion, four hundred fifty-six million, six hundred twenty-one thousand, four hundred forty-seven".