2027129555529 has 135 divisors (see below), whose sum is σ = 3368970848727. Its totient is φ = 1214148053664.

The previous prime is 2027129555509. The next prime is 2027129555537. The reversal of 2027129555529 is 9255559217202.

The square root of 2027129555529 is 1423773.

It is a perfect power (a square), and thus also a powerful number.

2027129555529 is a `hidden beast` number, since 2 + 0 + 27 + 1 + 2 + 95 + 5 + 5 + 529 = 666.

It can be written as a sum of positive squares in only one way, i.e., 299871236025 + 1727258319504 = 547605^2 + 1314252^2 .

It is not a de Polignac number, because 2027129555529 - 2⁷ = 2027129555401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2027129555509) 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 134 ways as a sum of consecutive naturals, for example, 7163001822 + ... + 7163002104.

Almost surely, 2^{2027129555529} is an apocalyptic number.

2027129555529 is the 1423773-rd square number.

2027129555529 is the 711887-th centered octagonal number.

It is an amenable number.

2027129555529 is a deficient number, since it is larger than the sum of its proper divisors (1341841293198).

2027129555529 is an frugal number, since it uses more digits than its factorization.

2027129555529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 54.

The spelling of 2027129555529 in words is "two trillion, twenty-seven billion, one hundred twenty-nine million, five hundred fifty-five thousand, five hundred twenty-nine".