27159604421 has 4 divisors (see below), whose sum is σ = 27185745600. Its totient is φ = 27133463244.

The previous prime is 27159604363. The next prime is 27159604429. The reversal of 27159604421 is 12440695172.

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 27159604421 - 2²⁶ = 27092495557 is a prime.

It is a super-2 number, since 2×27159604421² (a number of 22 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 (27159604429) 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, 13069031 + ... + 13071108.

It is an arithmetic number, because the mean of its divisors is an integer number (6796436400).

Almost surely, 2^27159604421 is an apocalyptic number.

It is an amenable number.

27159604421 is a deficient number, since it is larger than the sum of its proper divisors (26141179).

27159604421 is a wasteful number, since it uses less digits than its factorization.

27159604421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26141178.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 27159604421 in words is "twenty-seven billion, one hundred fifty-nine million, six hundred four thousand, four hundred twenty-one".