13405501445421 has 4 divisors (see below), whose sum is σ = 17874001927232. Its totient is φ = 8937000963612.

The previous prime is 13405501445389. The next prime is 13405501445507. The reversal of 13405501445421 is 12454410550431.

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 not a de Polignac number, because 13405501445421 - 2⁵ = 13405501445389 is a prime.

It is a Duffinian number.

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 13405501445421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13405501440421) 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, 2234250240901 + ... + 2234250240906.

It is an arithmetic number, because the mean of its divisors is an integer number (4468500481808).

Almost surely, 2^{13405501445421} is an apocalyptic number.

It is an amenable number.

13405501445421 is a deficient number, since it is larger than the sum of its proper divisors (4468500481811).

13405501445421 is an equidigital number, since it uses as much as digits as its factorization.

13405501445421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468500481810.

The product of its (nonzero) digits is 192000, while the sum is 39.

Adding to 13405501445421 its reverse (12454410550431), we get a palindrome (25859911995852).

The spelling of 13405501445421 in words is "thirteen trillion, four hundred five billion, five hundred one million, four hundred forty-five thousand, four hundred twenty-one".