2639952292849 has 27 divisors (see below), whose sum is σ = 2711629677771. Its totient is φ = 2570162559120.

The previous prime is 2639952292829. The next prime is 2639952292871. The reversal of 2639952292849 is 9482922599362.

It is a happy number.

The square root of 2639952292849 is 1624793.

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., 773810512225 + 1866141780624 = 879665^2 + 1366068^2 .

It is not a de Polignac number, because 2639952292849 - 2³¹ = 2637804809201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2639952292829) 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 26 ways as a sum of consecutive naturals, for example, 16814982679 + ... + 16814982835.

Almost surely, 2^{2639952292849} is an apocalyptic number.

2639952292849 is the 1624793-rd square number.

2639952292849 is the 812397-th centered octagonal number.

It is an amenable number.

2639952292849 is a deficient number, since it is larger than the sum of its proper divisors (71677384922).

2639952292849 is an frugal number, since it uses more digits than its factorization.

2639952292849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 367 counting only the distinct ones).

The product of its digits is 302330880, while the sum is 70.

The spelling of 2639952292849 in words is "two trillion, six hundred thirty-nine billion, nine hundred fifty-two million, two hundred ninety-two thousand, eight hundred forty-nine".