27891441701 has 4 divisors (see below), whose sum is σ = 28417695372. Its totient is φ = 27365188032.

The previous prime is 27891441691. The next prime is 27891441749. The reversal of 27891441701 is 10714419872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21171705025 + 6719736676 = 145505^2 + 81974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27891441701 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 (27891441751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263126756 + ... + 263126861.

It is an arithmetic number, because the mean of its divisors is an integer number (7104423843).

Almost surely, 2^27891441701 is an apocalyptic number.

It is an amenable number.

27891441701 is a deficient number, since it is larger than the sum of its proper divisors (526253671).

27891441701 is an equidigital number, since it uses as much as digits as its factorization.

27891441701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526253670.

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 27891441701 in words is "twenty-seven billion, eight hundred ninety-one million, four hundred forty-one thousand, seven hundred one".