27998716731 has 8 divisors (see below), whose sum is σ = 37519219200. Its totient is φ = 18572012712.

The previous prime is 27998716727. The next prime is 27998716751. The reversal of 27998716731 is 13761789972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27998716731 - 2² = 27998716727 is a prime.

It is a super-2 number, since 2×27998716731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27998716751) 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, 23448915 + ... + 23450108.

It is an arithmetic number, because the mean of its divisors is an integer number (4689902400).

Almost surely, 2^27998716731 is an apocalyptic number.

27998716731 is a deficient number, since it is larger than the sum of its proper divisors (9520502469).

27998716731 is a wasteful number, since it uses less digits than its factorization.

27998716731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46899225.

The product of its digits is 8001504, while the sum is 60.

The spelling of 27998716731 in words is "twenty-seven billion, nine hundred ninety-eight million, seven hundred sixteen thousand, seven hundred thirty-one".