2180685593879 has 4 divisors (see below), whose sum is σ = 2348430639576. Its totient is φ = 2012940548184.

The previous prime is 2180685593851. The next prime is 2180685593897. The reversal of 2180685593879 is 9783955860812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2180685593879 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 (2180685593899) 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, 83872522829 + ... + 83872522854.

It is an arithmetic number, because the mean of its divisors is an integer number (587107659894).

Almost surely, 2^{2180685593879} is an apocalyptic number.

2180685593879 is a deficient number, since it is larger than the sum of its proper divisors (167745045697).

2180685593879 is a wasteful number, since it uses less digits than its factorization.

2180685593879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167745045696.

The product of its (nonzero) digits is 261273600, while the sum is 71.

The spelling of 2180685593879 in words is "two trillion, one hundred eighty billion, six hundred eighty-five million, five hundred ninety-three thousand, eight hundred seventy-nine".