27991673069 has 8 divisors (see below), whose sum is σ = 29588208000. Its totient is φ = 26407467072.

The previous prime is 27991673029. The next prime is 27991673093. The reversal of 27991673069 is 96037619972.

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

It is a de Polignac number, because none of the positive numbers 2^k-27991673069 is a prime.

It is a super-2 number, since 2×27991673069² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27991672999 and 27991673017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27991673009) 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, 3077564 + ... + 3086645.

It is an arithmetic number, because the mean of its divisors is an integer number (3698526000).

Almost surely, 2^27991673069 is an apocalyptic number.

It is an amenable number.

27991673069 is a deficient number, since it is larger than the sum of its proper divisors (1596534931).

27991673069 is a wasteful number, since it uses less digits than its factorization.

27991673069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6164467.

The product of its (nonzero) digits is 7715736, while the sum is 59.

The spelling of 27991673069 in words is "twenty-seven billion, nine hundred ninety-one million, six hundred seventy-three thousand, sixty-nine".