27731731442 has 16 divisors (see below), whose sum is σ = 44806390272. Its totient is φ = 12835162560.

The previous prime is 27731731427. The next prime is 27731731451. The reversal of 27731731442 is 24413713772.

It is a super-2 number, since 2×27731731442² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27731731442.

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 7 ways as a sum of consecutive naturals, for example, 9722183 + ... + 9725034.

It is an arithmetic number, because the mean of its divisors is an integer number (2800399392).

Almost surely, 2^27731731442 is an apocalyptic number.

27731731442 is a deficient number, since it is larger than the sum of its proper divisors (17074658830).

27731731442 is a wasteful number, since it uses less digits than its factorization.

27731731442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19447273.

The product of its digits is 197568, while the sum is 41.

The spelling of 27731731442 in words is "twenty-seven billion, seven hundred thirty-one million, seven hundred thirty-one thousand, four hundred forty-two".