27771641679 has 8 divisors (see below), whose sum is σ = 38223334912. Its totient is φ = 17917188120.

The previous prime is 27771641603. The next prime is 27771641687. The reversal of 27771641679 is 97614617772.

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

It is not a de Polignac number, because 27771641679 - 2¹² = 27771637583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771641699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149309809 + ... + 149309994.

It is an arithmetic number, because the mean of its divisors is an integer number (4777916864).

Almost surely, 2^27771641679 is an apocalyptic number.

27771641679 is a deficient number, since it is larger than the sum of its proper divisors (10451693233).

27771641679 is a wasteful number, since it uses less digits than its factorization.

27771641679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298619837.

The product of its digits is 6223392, while the sum is 57.

The spelling of 27771641679 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty-one thousand, six hundred seventy-nine".