27445778957 has 8 divisors (see below), whose sum is σ = 27853503552. Its totient is φ = 27038642400.

The previous prime is 27445778909. The next prime is 27445778981. The reversal of 27445778957 is 75987754472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27445778957 - 2¹² = 27445774861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27445778893 and 27445778902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27445718957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52523 + ... + 240104.

It is an arithmetic number, because the mean of its divisors is an integer number (3481687944).

Almost surely, 2^27445778957 is an apocalyptic number.

It is an amenable number.

27445778957 is a deficient number, since it is larger than the sum of its proper divisors (407724595).

27445778957 is a wasteful number, since it uses less digits than its factorization.

27445778957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294019.

The product of its digits is 138297600, while the sum is 65.

The spelling of 27445778957 in words is "twenty-seven billion, four hundred forty-five million, seven hundred seventy-eight thousand, nine hundred fifty-seven".