27771641512 has 16 divisors (see below), whose sum is σ = 52079395860. Its totient is φ = 13883802624.

The previous prime is 27771641501. The next prime is 27771641539. The reversal of 27771641512 is 21514617772.

It can be written as a sum of positive squares in 2 ways, for example, as 25240947876 + 2530693636 = 158874^2 + 50306^2 .

It is a super-2 number, since 2×27771641512² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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, 192963 + ... + 304594.

Almost surely, 2^27771641512 is an apocalyptic number.

It is an amenable number.

27771641512 is a deficient number, since it is larger than the sum of its proper divisors (24307754348).

27771641512 is a wasteful number, since it uses less digits than its factorization.

27771641512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504540 (or 504536 counting only the distinct ones).

The product of its digits is 164640, while the sum is 43.

The spelling of 27771641512 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty-one thousand, five hundred twelve".