2646189788 has 24 divisors (see below), whose sum is σ = 5062814064. Its totient is φ = 1200195200.

The previous prime is 2646189781. The next prime is 2646189829. The reversal of 2646189788 is 8879816462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646189781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44945 + ... + 85512.

It is an arithmetic number, because the mean of its divisors is an integer number (210950586).

Almost surely, 2^2646189788 is an apocalyptic number.

It is an amenable number.

2646189788 is a deficient number, since it is larger than the sum of its proper divisors (2416624276).

2646189788 is a wasteful number, since it uses less digits than its factorization.

2646189788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130933 (or 130931 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The square root of 2646189788 is about 51441.1293421908. The cubic root of 2646189788 is about 1383.1639558172.

The spelling of 2646189788 in words is "two billion, six hundred forty-six million, one hundred eighty-nine thousand, seven hundred eighty-eight".