2138762855 has 4 divisors (see below), whose sum is σ = 2566515432. Its totient is φ = 1711010280.

The previous prime is 2138762851. The next prime is 2138762863. The reversal of 2138762855 is 5582678312.

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

It is not a de Polignac number, because 2138762855 - 2² = 2138762851 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 (2138762851) 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 3 ways as a sum of consecutive naturals, for example, 213876281 + ... + 213876290.

It is an arithmetic number, because the mean of its divisors is an integer number (641628858).

Almost surely, 2^2138762855 is an apocalyptic number.

2138762855 is a deficient number, since it is larger than the sum of its proper divisors (427752577).

2138762855 is an equidigital number, since it uses as much as digits as its factorization.

2138762855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427752576.

The product of its digits is 806400, while the sum is 47.

The square root of 2138762855 is about 46246.7604811407. The cubic root of 2138762855 is about 1288.4103679261.

The spelling of 2138762855 in words is "two billion, one hundred thirty-eight million, seven hundred sixty-two thousand, eight hundred fifty-five".