2538649815 has 16 divisors (see below), whose sum is σ = 4374289248. Its totient is φ = 1249796736.

The previous prime is 2538649811. The next prime is 2538649819. The reversal of 2538649815 is 5189468352.

It is an interprime number because it is at equal distance from previous prime (2538649811) and next prime (2538649819).

It is not a de Polignac number, because 2538649815 - 2² = 2538649811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2538649811) 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 15 ways as a sum of consecutive naturals, for example, 6509164 + ... + 6509553.

It is an arithmetic number, because the mean of its divisors is an integer number (273393078).

Almost surely, 2^2538649815 is an apocalyptic number.

2538649815 is a deficient number, since it is larger than the sum of its proper divisors (1835639433).

2538649815 is a wasteful number, since it uses less digits than its factorization.

2538649815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13018738.

The product of its digits is 2073600, while the sum is 51.

The square root of 2538649815 is about 50385.0157785030. The cubic root of 2538649815 is about 1364.1671877852.

The spelling of 2538649815 in words is "two billion, five hundred thirty-eight million, six hundred forty-nine thousand, eight hundred fifteen".