16227581613 has 4 divisors (see below), whose sum is σ = 21636775488. Its totient is φ = 10818387740.

The previous prime is 16227581599. The next prime is 16227581627. The reversal of 16227581613 is 31618572261.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31618572261 = 3 ⋅10539524087.

It is an interprime number because it is at equal distance from previous prime (16227581599) and next prime (16227581627).

It is a cyclic number.

It is not a de Polignac number, because 16227581613 - 2⁵ = 16227581581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16227581633) 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, 2704596933 + ... + 2704596938.

It is an arithmetic number, because the mean of its divisors is an integer number (5409193872).

Almost surely, 2^16227581613 is an apocalyptic number.

It is an amenable number.

16227581613 is a deficient number, since it is larger than the sum of its proper divisors (5409193875).

16227581613 is an equidigital number, since it uses as much as digits as its factorization.

16227581613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5409193874.

The product of its digits is 120960, while the sum is 42.

The spelling of 16227581613 in words is "sixteen billion, two hundred twenty-seven million, five hundred eighty-one thousand, six hundred thirteen".