2539634266129 has 9 divisors (see below), whose sum is σ = 2600139204219. Its totient is φ = 2480506071960.

The previous prime is 2539634266123. The next prime is 2539634266157. The reversal of 2539634266129 is 9216624369352.

The square root of 2539634266129 is 1593623.

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

It can be written as a sum of positive squares in only one way, i.e., 2283051494529 + 256582771600 = 1510977^2 + 506540^2 .

It is not a de Polignac number, because 2539634266129 - 2²¹ = 2539632168977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2539634266123) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 68507259 + ... + 68544319.

Almost surely, 2^{2539634266129} is an apocalyptic number.

2539634266129 is the 1593623-rd square number.

2539634266129 is the 796812-nd centered octagonal number.

It is an amenable number.

2539634266129 is a deficient number, since it is larger than the sum of its proper divisors (60504938090).

2539634266129 is an frugal number, since it uses more digits than its factorization.

2539634266129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74208 (or 37104 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 58.

The spelling of 2539634266129 in words is "two trillion, five hundred thirty-nine billion, six hundred thirty-four million, two hundred sixty-six thousand, one hundred twenty-nine".