2639524949 has 4 divisors (see below), whose sum is σ = 2684262720. Its totient is φ = 2594787180.

The previous prime is 2639524939. The next prime is 2639524957. The reversal of 2639524949 is 9494259362.

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 a de Polignac number, because none of the positive numbers 2^k-2639524949 is a prime.

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 2639524949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639524939) 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, 22368797 + ... + 22368914.

It is an arithmetic number, because the mean of its divisors is an integer number (671065680).

Almost surely, 2^2639524949 is an apocalyptic number.

It is an amenable number.

2639524949 is a deficient number, since it is larger than the sum of its proper divisors (44737771).

2639524949 is an equidigital number, since it uses as much as digits as its factorization.

2639524949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44737770.

The product of its digits is 4199040, while the sum is 53.

The square root of 2639524949 is about 51376.3072729055. The cubic root of 2639524949 is about 1382.0017419519.

The spelling of 2639524949 in words is "two billion, six hundred thirty-nine million, five hundred twenty-four thousand, nine hundred forty-nine".