27907631669 has 4 divisors (see below), whose sum is σ = 27930193644. Its totient is φ = 27885069696.

The previous prime is 27907631651. The next prime is 27907631707. The reversal of 27907631669 is 96613670972.

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 14704472644 + 13203159025 = 121262^2 + 114905^2 .

It is a cyclic number.

It is not a de Polignac number, because 27907631669 - 2²⁰ = 27906583093 is a prime.

It is a super-2 number, since 2×27907631669² (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 (27907631629) 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, 11279132 + ... + 11281605.

It is an arithmetic number, because the mean of its divisors is an integer number (6982548411).

Almost surely, 2^27907631669 is an apocalyptic number.

It is an amenable number.

27907631669 is a deficient number, since it is larger than the sum of its proper divisors (22561975).

27907631669 is a wasteful number, since it uses less digits than its factorization.

27907631669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22561974.

The product of its (nonzero) digits is 5143824, while the sum is 56.

The spelling of 27907631669 in words is "twenty-seven billion, nine hundred seven million, six hundred thirty-one thousand, six hundred sixty-nine".