2182978661129 has 6 divisors (see below), whose sum is σ = 2539383340554. Its totient is φ = 1871124566640.

The previous prime is 2182978661113. The next prime is 2182978661141. The reversal of 2182978661129 is 9211668792812.

It can be written as a sum of positive squares in only one way, i.e., 1201347523600 + 981631137529 = 1096060^2 + 990773^2 .

It is not a de Polignac number, because 2182978661129 - 2⁴ = 2182978661113 is a prime.

It is a super-2 number, since 2×2182978661129² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2182978661029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22275292412 + ... + 22275292509.

It is an arithmetic number, because the mean of its divisors is an integer number (423230556759).

Almost surely, 2^{2182978661129} is an apocalyptic number.

It is an amenable number.

2182978661129 is a deficient number, since it is larger than the sum of its proper divisors (356404679425).

2182978661129 is an equidigital number, since it uses as much as digits as its factorization.

2182978661129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44550584935 (or 44550584928 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 62.

The spelling of 2182978661129 in words is "two trillion, one hundred eighty-two billion, nine hundred seventy-eight million, six hundred sixty-one thousand, one hundred twenty-nine".