13571648639 has 8 divisors (see below), whose sum is σ = 13651601520. Its totient is φ = 13491795456.

The previous prime is 13571648621. The next prime is 13571648677. The reversal of 13571648639 is 93684617531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13571648639 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 (13571648039) 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, 257489 + ... + 305685.

It is an arithmetic number, because the mean of its divisors is an integer number (1706450190).

Almost surely, 2^13571648639 is an apocalyptic number.

13571648639 is a deficient number, since it is larger than the sum of its proper divisors (79952881).

13571648639 is a wasteful number, since it uses less digits than its factorization.

13571648639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49849.

The product of its digits is 3265920, while the sum is 53.

The spelling of 13571648639 in words is "thirteen billion, five hundred seventy-one million, six hundred forty-eight thousand, six hundred thirty-nine".