27949132642 has 16 divisors (see below), whose sum is σ = 45472479192. Its totient is φ = 12831738880.

The previous prime is 27949132619. The next prime is 27949132643. The reversal of 27949132642 is 24623194972.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12296370321 + 15652762321 = 110889^2 + 125111^2 .

It is not an unprimeable number, because it can be changed into a prime (27949132643) 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, 10023403 + ... + 10026190.

Almost surely, 2^27949132642 is an apocalyptic number.

27949132642 is a deficient number, since it is larger than the sum of its proper divisors (17523346550).

27949132642 is a wasteful number, since it uses less digits than its factorization.

27949132642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20049653.

The product of its digits is 1306368, while the sum is 49.

The spelling of 27949132642 in words is "twenty-seven billion, nine hundred forty-nine million, one hundred thirty-two thousand, six hundred forty-two".