13621653427 has 8 divisors (see below), whose sum is σ = 14438845296. Its totient is φ = 12806230272.

The previous prime is 13621653407. The next prime is 13621653431. The reversal of 13621653427 is 72435612631.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13621653427 - 2¹⁵ = 13621620659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13621653427.

It is not an unprimeable number, because it can be changed into a prime (13621653407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426298 + ... + 457135.

It is an arithmetic number, because the mean of its divisors is an integer number (1804855662).

Almost surely, 2^13621653427 is an apocalyptic number.

13621653427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13621653427 is a deficient number, since it is larger than the sum of its proper divisors (817191869).

13621653427 is an equidigital number, since it uses as much as digits as its factorization.

13621653427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884357.

The product of its digits is 181440, while the sum is 40.

The spelling of 13621653427 in words is "thirteen billion, six hundred twenty-one million, six hundred fifty-three thousand, four hundred twenty-seven".