27485620405 has 4 divisors (see below), whose sum is σ = 32982744492. Its totient is φ = 21988496320.

The previous prime is 27485620397. The next prime is 27485620411. The reversal of 27485620405 is 50402658472.

It is a happy number.

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 20794216804 + 6691403601 = 144202^2 + 81801^2 .

It is not a de Polignac number, because 27485620405 - 2³ = 27485620397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2748562036 + ... + 2748562045.

It is an arithmetic number, because the mean of its divisors is an integer number (8245686123).

Almost surely, 2^27485620405 is an apocalyptic number.

It is an amenable number.

27485620405 is a deficient number, since it is larger than the sum of its proper divisors (5497124087).

27485620405 is an equidigital number, since it uses as much as digits as its factorization.

27485620405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5497124086.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 27485620405 in words is "twenty-seven billion, four hundred eighty-five million, six hundred twenty thousand, four hundred five".