27355161989 has 4 divisors (see below), whose sum is σ = 27369330240. Its totient is φ = 27340993740.

The previous prime is 27355161979. The next prime is 27355162091. The reversal of 27355161989 is 98916155372.

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.

It is a cyclic number.

It is not a de Polignac number, because 27355161989 - 2¹⁶ = 27355096453 is a prime.

It is a super-2 number, since 2×27355161989² (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 (27355161929) 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, 7081229 + ... + 7085090.

It is an arithmetic number, because the mean of its divisors is an integer number (6842332560).

Almost surely, 2^27355161989 is an apocalyptic number.

It is an amenable number.

27355161989 is a deficient number, since it is larger than the sum of its proper divisors (14168251).

27355161989 is a wasteful number, since it uses less digits than its factorization.

27355161989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14168250.

The product of its digits is 4082400, while the sum is 56.

The spelling of 27355161989 in words is "twenty-seven billion, three hundred fifty-five million, one hundred sixty-one thousand, nine hundred eighty-nine".