27731381546 has 32 divisors (see below), whose sum is σ = 48130189632. Its totient is φ = 11843388160.

The previous prime is 27731381537. The next prime is 27731381567. The reversal of 27731381546 is 64518313772.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27731381546.

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 15 ways as a sum of consecutive naturals, for example, 156380 + ... + 282696.

It is an arithmetic number, because the mean of its divisors is an integer number (1504068426).

Almost surely, 2^27731381546 is an apocalyptic number.

27731381546 is a deficient number, since it is larger than the sum of its proper divisors (20398808086).

27731381546 is a wasteful number, since it uses less digits than its factorization.

27731381546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126934.

The product of its digits is 846720, while the sum is 47.

The spelling of 27731381546 in words is "twenty-seven billion, seven hundred thirty-one million, three hundred eighty-one thousand, five hundred forty-six".