27842311641 has 4 divisors (see below), whose sum is σ = 37123082192. Its totient is φ = 18561541092.

The previous prime is 27842311639. The next prime is 27842311649. The reversal of 27842311641 is 14611324872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27842311641 - 2¹ = 27842311639 is a prime.

It is a super-2 number, since 2×27842311641² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27842311641.

It is not an unprimeable number, because it can be changed into a prime (27842311649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4640385271 + ... + 4640385276.

It is an arithmetic number, because the mean of its divisors is an integer number (9280770548).

Almost surely, 2^27842311641 is an apocalyptic number.

It is an amenable number.

27842311641 is a deficient number, since it is larger than the sum of its proper divisors (9280770551).

27842311641 is an equidigital number, since it uses as much as digits as its factorization.

27842311641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280770550.

The product of its digits is 64512, while the sum is 39.

It can be divided in two parts, 2784231 and 1641, that added together give a palindrome (2785872).

The spelling of 27842311641 in words is "twenty-seven billion, eight hundred forty-two million, three hundred eleven thousand, six hundred forty-one".