13651336421 has 4 divisors (see below), whose sum is σ = 14091702144. Its totient is φ = 13210970700.

The previous prime is 13651336411. The next prime is 13651336423. The reversal of 13651336421 is 12463315631.

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 13651336421 - 2¹⁸ = 13651074277 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 (13651336423) 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, 220182815 + ... + 220182876.

It is an arithmetic number, because the mean of its divisors is an integer number (3522925536).

Almost surely, 2^13651336421 is an apocalyptic number.

It is an amenable number.

13651336421 is a deficient number, since it is larger than the sum of its proper divisors (440365723).

13651336421 is an equidigital number, since it uses as much as digits as its factorization.

13651336421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440365722.

The product of its digits is 38880, while the sum is 35.

The spelling of 13651336421 in words is "thirteen billion, six hundred fifty-one million, three hundred thirty-six thousand, four hundred twenty-one".