13533975647 has 4 divisors (see below), whose sum is σ = 13864072656. Its totient is φ = 13203878640.

The previous prime is 13533975593. The next prime is 13533975667. The reversal of 13533975647 is 74657933531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74657933531 = 84131 ⋅887401.

It is a cyclic number.

It is not a de Polignac number, because 13533975647 - 2⁸ = 13533975391 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 (13533975667) 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, 165048443 + ... + 165048524.

It is an arithmetic number, because the mean of its divisors is an integer number (3466018164).

Almost surely, 2^13533975647 is an apocalyptic number.

13533975647 is a deficient number, since it is larger than the sum of its proper divisors (330097009).

13533975647 is an equidigital number, since it uses as much as digits as its factorization.

13533975647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330097008.

The product of its digits is 7144200, while the sum is 53.

The spelling of 13533975647 in words is "thirteen billion, five hundred thirty-three million, nine hundred seventy-five thousand, six hundred forty-seven".