2645636928 has 168 divisors, whose sum is σ = 7741212864. Its totient is φ = 796815360.

The previous prime is 2645636921. The next prime is 2645636957. The reversal of 2645636928 is 8296365462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645636921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6109800 + ... + 6110232.

It is an arithmetic number, because the mean of its divisors is an integer number (46078648).

Almost surely, 2^2645636928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645636928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3870606432).

2645636928 is an abundant number, since it is smaller than the sum of its proper divisors (5095575936).

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

2645636928 is a wasteful number, since it uses less digits than its factorization.

2645636928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 712 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 2645636928 is about 51435.7553458681. The cubic root of 2645636928 is about 1383.0676224288.

The spelling of 2645636928 in words is "two billion, six hundred forty-five million, six hundred thirty-six thousand, nine hundred twenty-eight".