27640605846191 has 16 divisors (see below), whose sum is σ = 30091587348480. Its totient is φ = 25237376310240.

The previous prime is 27640605846151. The next prime is 27640605846229. The reversal of 27640605846191 is 19164850604672.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27640605846191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27640605846191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27640605846151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27732455 + ... + 28711848.

It is an arithmetic number, because the mean of its divisors is an integer number (1880724209280).

Almost surely, 2^{27640605846191} is an apocalyptic number.

27640605846191 is a deficient number, since it is larger than the sum of its proper divisors (2450981502289).

27640605846191 is a wasteful number, since it uses less digits than its factorization.

27640605846191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56444726.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 27640605846191 in words is "twenty-seven trillion, six hundred forty billion, six hundred five million, eight hundred forty-six thousand, one hundred ninety-one".