13455501147421 has 4 divisors (see below), whose sum is σ = 13455576207612. Its totient is φ = 13455426087232.

The previous prime is 13455501147383. The next prime is 13455501147463. The reversal of 13455501147421 is 12474110555431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4181411522500 + 9274089624921 = 2044850^2 + 3045339^2 .

It is a cyclic number.

It is not a de Polignac number, because 13455501147421 - 2⁷ = 13455501147293 is a prime.

It is a super-2 number, since 2×13455501147421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13455501177421) 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, 37260556 + ... + 37619941.

It is an arithmetic number, because the mean of its divisors is an integer number (3363894051903).

Almost surely, 2^{13455501147421} is an apocalyptic number.

It is an amenable number.

13455501147421 is a deficient number, since it is larger than the sum of its proper divisors (75060191).

13455501147421 is an equidigital number, since it uses as much as digits as its factorization.

13455501147421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75060190.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 13455501147421 in words is "thirteen trillion, four hundred fifty-five billion, five hundred one million, one hundred forty-seven thousand, four hundred twenty-one".