2538640869 has 4 divisors (see below), whose sum is σ = 3384854496. Its totient is φ = 1692427244.

The previous prime is 2538640823. The next prime is 2538640873. The reversal of 2538640869 is 9680468352.

2538640869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2538640869 - 2¹⁵ = 2538608101 is a prime.

It is a super-2 number, since 2×2538640869² = 12889394923514150322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538640669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423106809 + ... + 423106814.

It is an arithmetic number, because the mean of its divisors is an integer number (846213624).

Almost surely, 2^2538640869 is an apocalyptic number.

It is an amenable number.

2538640869 is a deficient number, since it is larger than the sum of its proper divisors (846213627).

2538640869 is an equidigital number, since it uses as much as digits as its factorization.

2538640869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846213626.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The square root of 2538640869 is about 50384.9270020311. The cubic root of 2538640869 is about 1364.1655853777.

The spelling of 2538640869 in words is "two billion, five hundred thirty-eight million, six hundred forty thousand, eight hundred sixty-nine".