2646788538 has 32 divisors (see below), whose sum is σ = 5427217152. Its totient is φ = 860025600.

The previous prime is 2646788537. The next prime is 2646788539. The reversal of 2646788538 is 8358876462.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2646788537) and next prime (2646788539).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2646788537) 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, 346278 + ... + 353838.

It is an arithmetic number, because the mean of its divisors is an integer number (169600536).

Almost surely, 2^2646788538 is an apocalyptic number.

2646788538 is an abundant number, since it is smaller than the sum of its proper divisors (2780428614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2646788538 is a wasteful number, since it uses less digits than its factorization.

2646788538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9030.

The product of its digits is 15482880, while the sum is 57.

The square root of 2646788538 is about 51446.9487724977. The cubic root of 2646788538 is about 1383.2682702000.

The spelling of 2646788538 in words is "two billion, six hundred forty-six million, seven hundred eighty-eight thousand, five hundred thirty-eight".