2138776441 has 4 divisors (see below), whose sum is σ = 2188515472. Its totient is φ = 2089037412.

The previous prime is 2138776433. The next prime is 2138776457. The reversal of 2138776441 is 1446778312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2138776441 - 2³ = 2138776433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 49738987 = 2138776441 / (2 + 1 + 3 + 8 + 7 + 7 + 6 + 4 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138776421) 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, 24869451 + ... + 24869536.

It is an arithmetic number, because the mean of its divisors is an integer number (547128868).

Almost surely, 2^2138776441 is an apocalyptic number.

It is an amenable number.

2138776441 is a deficient number, since it is larger than the sum of its proper divisors (49739031).

2138776441 is an equidigital number, since it uses as much as digits as its factorization.

2138776441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49739030.

The product of its digits is 225792, while the sum is 43.

The square root of 2138776441 is about 46246.9073668716. The cubic root of 2138776441 is about 1288.4130960306.

The spelling of 2138776441 in words is "two billion, one hundred thirty-eight million, seven hundred seventy-six thousand, four hundred forty-one".