27771421834 has 16 divisors (see below), whose sum is σ = 44912141568. Its totient is φ = 12803118192.

The previous prime is 27771421819. The next prime is 27771421837. The reversal of 27771421834 is 43812417772.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27771421837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579042 + ... + 625165.

It is an arithmetic number, because the mean of its divisors is an integer number (2807008848).

Almost surely, 2^27771421834 is an apocalyptic number.

27771421834 is a deficient number, since it is larger than the sum of its proper divisors (17140719734).

27771421834 is a wasteful number, since it uses less digits than its factorization.

27771421834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205109.

The product of its digits is 526848, while the sum is 46.

The spelling of 27771421834 in words is "twenty-seven billion, seven hundred seventy-one million, four hundred twenty-one thousand, eight hundred thirty-four".