2136881655 has 40 divisors (see below), whose sum is σ = 3850146432. Its totient is φ = 1133842752.

The previous prime is 2136881653. The next prime is 2136881693. The reversal of 2136881655 is 5561886312.

It is not a de Polignac number, because 2136881655 - 2¹ = 2136881653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2136881655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136881653) 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 39 ways as a sum of consecutive naturals, for example, 66394 + ... + 93176.

Almost surely, 2^2136881655 is an apocalyptic number.

2136881655 is a deficient number, since it is larger than the sum of its proper divisors (1713264777).

2136881655 is a wasteful number, since it uses less digits than its factorization.

2136881655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26997 (or 26988 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 2136881655 is about 46226.4172849249. The cubic root of 2136881655 is about 1288.0325064051.

The spelling of 2136881655 in words is "two billion, one hundred thirty-six million, eight hundred eighty-one thousand, six hundred fifty-five".