13423551549 has 4 divisors (see below), whose sum is σ = 17898068736. Its totient is φ = 8949034364.

The previous prime is 13423551527. The next prime is 13423551569. The reversal of 13423551549 is 94515532431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13423551549 - 2¹² = 13423547453 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13423551549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423551569) 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, 2237258589 + ... + 2237258594.

It is an arithmetic number, because the mean of its divisors is an integer number (4474517184).

Almost surely, 2^13423551549 is an apocalyptic number.

It is an amenable number.

13423551549 is a deficient number, since it is larger than the sum of its proper divisors (4474517187).

13423551549 is an equidigital number, since it uses as much as digits as its factorization.

13423551549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474517186.

The product of its digits is 324000, while the sum is 42.

The spelling of 13423551549 in words is "thirteen billion, four hundred twenty-three million, five hundred fifty-one thousand, five hundred forty-nine".