2142189427877 has 4 divisors (see below), whose sum is σ = 2154572025900. Its totient is φ = 2129806829856.

The previous prime is 2142189427849. The next prime is 2142189427907. The reversal of 2142189427877 is 7787249812412.

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 1770472409281 + 371717018596 = 1330591^2 + 609686^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142189427877 - 2⁸ = 2142189427621 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 (2142189427817) 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, 6191298752 + ... + 6191299097.

It is an arithmetic number, because the mean of its divisors is an integer number (538643006475).

Almost surely, 2^{2142189427877} is an apocalyptic number.

It is an amenable number.

2142189427877 is a deficient number, since it is larger than the sum of its proper divisors (12382598023).

2142189427877 is a wasteful number, since it uses less digits than its factorization.

2142189427877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382598022.

The product of its digits is 25288704, while the sum is 62.

The spelling of 2142189427877 in words is "two trillion, one hundred forty-two billion, one hundred eighty-nine million, four hundred twenty-seven thousand, eight hundred seventy-seven".