27490405487 has 4 divisors (see below), whose sum is σ = 27564106680. Its totient is φ = 27416704296.

The previous prime is 27490405477. The next prime is 27490405499. The reversal of 27490405487 is 78450409472.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27490405487 - 2⁸ = 27490405231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27490405477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36850037 + ... + 36850782.

It is an arithmetic number, because the mean of its divisors is an integer number (6891026670).

Almost surely, 2^27490405487 is an apocalyptic number.

27490405487 is a deficient number, since it is larger than the sum of its proper divisors (73701193).

27490405487 is an equidigital number, since it uses as much as digits as its factorization.

27490405487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73701192.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 27490405487 in words is "twenty-seven billion, four hundred ninety million, four hundred five thousand, four hundred eighty-seven".