27945396369 has 36 divisors (see below), whose sum is σ = 45800075776. Its totient is φ = 16390242000.

The previous prime is 27945396361. The next prime is 27945396373. The reversal of 27945396369 is 96369354972.

27945396369 is a `hidden beast` number, since 2 + 7 + 94 + 539 + 6 + 3 + 6 + 9 = 666.

It is not a de Polignac number, because 27945396369 - 2³ = 27945396361 is a prime.

It is a super-2 number, since 2×27945396369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27945396361) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 380137 + ... + 447654.

Almost surely, 2^27945396369 is an apocalyptic number.

It is an amenable number.

27945396369 is a deficient number, since it is larger than the sum of its proper divisors (17854679407).

27945396369 is a wasteful number, since it uses less digits than its factorization.

27945396369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827850 (or 827836 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 63.

The spelling of 27945396369 in words is "twenty-seven billion, nine hundred forty-five million, three hundred ninety-six thousand, three hundred sixty-nine".