13541421613 has 4 divisors (see below), whose sum is σ = 13796920188. Its totient is φ = 13285923040.

The previous prime is 13541421611. The next prime is 13541421623. The reversal of 13541421613 is 31612414531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31612414531 = 563 ⋅56149937.

It can be written as a sum of positive squares in 2 ways, for example, as 10093618089 + 3447803524 = 100467^2 + 58718^2 .

It is a cyclic number.

It is not a de Polignac number, because 13541421613 - 2¹ = 13541421611 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 (13541421611) 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, 127749208 + ... + 127749313.

It is an arithmetic number, because the mean of its divisors is an integer number (3449230047).

Almost surely, 2^13541421613 is an apocalyptic number.

It is an amenable number.

13541421613 is a deficient number, since it is larger than the sum of its proper divisors (255498575).

13541421613 is an equidigital number, since it uses as much as digits as its factorization.

13541421613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255498574.

The product of its digits is 8640, while the sum is 31.

The spelling of 13541421613 in words is "thirteen billion, five hundred forty-one million, four hundred twenty-one thousand, six hundred thirteen".