2138831773481 has 32 divisors (see below), whose sum is σ = 2333735040000. Its totient is φ = 1948475995200.

The previous prime is 2138831773453. The next prime is 2138831773511. The reversal of 2138831773481 is 1843771388312.

It is a cyclic number.

It is not a de Polignac number, because 2138831773481 - 2²² = 2138827579177 is a prime.

It is a super-2 number, since 2×2138831773481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2138831775481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222350090 + ... + 222359708.

It is an arithmetic number, because the mean of its divisors is an integer number (72929220000).

Almost surely, 2^{2138831773481} is an apocalyptic number.

It is an amenable number.

2138831773481 is a deficient number, since it is larger than the sum of its proper divisors (194903266519).

2138831773481 is a wasteful number, since it uses less digits than its factorization.

2138831773481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10509.

The product of its digits is 5419008, while the sum is 56.

The spelling of 2138831773481 in words is "two trillion, one hundred thirty-eight billion, eight hundred thirty-one million, seven hundred seventy-three thousand, four hundred eighty-one".