2127681834387 has 4 divisors (see below), whose sum is σ = 2836909112520. Its totient is φ = 1418454556256.

The previous prime is 2127681834359. The next prime is 2127681834401. The reversal of 2127681834387 is 7834381867212.

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

It is a cyclic number.

It is not a de Polignac number, because 2127681834387 - 2⁶ = 2127681834323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2127681834387.

It is not an unprimeable number, because it can be changed into a prime (2127681835387) 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, 354613639062 + ... + 354613639067.

It is an arithmetic number, because the mean of its divisors is an integer number (709227278130).

Almost surely, 2^{2127681834387} is an apocalyptic number.

2127681834387 is a deficient number, since it is larger than the sum of its proper divisors (709227278133).

2127681834387 is an equidigital number, since it uses as much as digits as its factorization.

2127681834387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709227278132.

The product of its digits is 21676032, while the sum is 60.

The spelling of 2127681834387 in words is "two trillion, one hundred twenty-seven billion, six hundred eighty-one million, eight hundred thirty-four thousand, three hundred eighty-seven".