2538779091 has 4 divisors (see below), whose sum is σ = 3385038792. Its totient is φ = 1692519392.

The previous prime is 2538779071. The next prime is 2538779141. The reversal of 2538779091 is 1909778352.

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

It is a cyclic number.

It is not a de Polignac number, because 2538779091 - 2⁹ = 2538778579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2538779011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423129846 + ... + 423129851.

It is an arithmetic number, because the mean of its divisors is an integer number (846259698).

Almost surely, 2^2538779091 is an apocalyptic number.

2538779091 is a deficient number, since it is larger than the sum of its proper divisors (846259701).

2538779091 is an equidigital number, since it uses as much as digits as its factorization.

2538779091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846259700.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 2538779091 is about 50386.2986435797. The cubic root of 2538779091 is about 1364.1903432808.

The spelling of 2538779091 in words is "two billion, five hundred thirty-eight million, seven hundred seventy-nine thousand, ninety-one".