2639834961 has 4 divisors (see below), whose sum is σ = 3519779952. Its totient is φ = 1759889972.

The previous prime is 2639834929. The next prime is 2639834969. The reversal of 2639834961 is 1694389362.

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 2639834961 - 2⁵ = 2639834929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2639834969) 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, 439972491 + ... + 439972496.

It is an arithmetic number, because the mean of its divisors is an integer number (879944988).

Almost surely, 2^2639834961 is an apocalyptic number.

It is an amenable number.

2639834961 is a deficient number, since it is larger than the sum of its proper divisors (879944991).

2639834961 is an equidigital number, since it uses as much as digits as its factorization.

2639834961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879944990.

The product of its digits is 1679616, while the sum is 51.

The square root of 2639834961 is about 51379.3242559690. The cubic root of 2639834961 is about 1382.0558451662.

The spelling of 2639834961 in words is "two billion, six hundred thirty-nine million, eight hundred thirty-four thousand, nine hundred sixty-one".