2538985969 has 4 divisors (see below), whose sum is σ = 2734292596. Its totient is φ = 2343679344.

The previous prime is 2538985951. The next prime is 2538986071. The reversal of 2538985969 is 9695898352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136025569 + 2402960400 = 11663^2 + 49020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2538985969 - 2⁵ = 2538985937 is a prime.

It is a super-2 number, since 2×2538985969² = 12892899501557737922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2538985969.

It is not an unprimeable number, because it can be changed into a prime (2538985909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97653294 + ... + 97653319.

It is an arithmetic number, because the mean of its divisors is an integer number (683573149).

Almost surely, 2^2538985969 is an apocalyptic number.

It is an amenable number.

2538985969 is a deficient number, since it is larger than the sum of its proper divisors (195306627).

2538985969 is a wasteful number, since it uses less digits than its factorization.

2538985969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195306626.

The product of its digits is 41990400, while the sum is 64.

The square root of 2538985969 is about 50388.3515209617. The cubic root of 2538985969 is about 1364.2273969582.

The spelling of 2538985969 in words is "two billion, five hundred thirty-eight million, nine hundred eighty-five thousand, nine hundred sixty-nine".