2628193945 has 16 divisors (see below), whose sum is σ = 3460523472. Its totient is φ = 1904198400.

The previous prime is 2628193891. The next prime is 2628193993. The reversal of 2628193945 is 5493918262.

2628193945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 196249 + 2627997696 = 443^2 + 51264^2 .

It is not a de Polignac number, because 2628193945 - 2³¹ = 480710297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378006 + ... + 384895.

It is an arithmetic number, because the mean of its divisors is an integer number (216282717).

Almost surely, 2^2628193945 is an apocalyptic number.

It is an amenable number.

2628193945 is a deficient number, since it is larger than the sum of its proper divisors (832329527).

2628193945 is a wasteful number, since it uses less digits than its factorization.

2628193945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762972.

The product of its digits is 933120, while the sum is 49.

The square root of 2628193945 is about 51265.9140657806. The cubic root of 2628193945 is about 1380.0213441003.

The spelling of 2628193945 in words is "two billion, six hundred twenty-eight million, one hundred ninety-three thousand, nine hundred forty-five".