27731830642 has 16 divisors (see below), whose sum is σ = 43938208512. Its totient is φ = 13106565360.

The previous prime is 27731830639. The next prime is 27731830661. The reversal of 27731830642 is 24603813772.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 5198353 + ... + 5203684.

It is an arithmetic number, because the mean of its divisors is an integer number (2746138032).

Almost surely, 2^27731830642 is an apocalyptic number.

27731830642 is a deficient number, since it is larger than the sum of its proper divisors (16206377870).

27731830642 is a wasteful number, since it uses less digits than its factorization.

27731830642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10402113.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 27731830642 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred thirty thousand, six hundred forty-two".