4645642409 has 2 divisors, whose sum is σ = 4645642410. Its totient is φ = 4645642408.

The previous prime is 4645642357. The next prime is 4645642429. The reversal of 4645642409 is 9042465464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2715973225 + 1929669184 = 52115^2 + 43928^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645642409 - 2³² = 350675113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4645642409.

It is not a weakly prime, because it can be changed into another prime (4645642429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322821204 + 2322821205.

It is an arithmetic number, because the mean of its divisors is an integer number (2322821205).

Almost surely, 2^4645642409 is an apocalyptic number.

It is an amenable number.

4645642409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645642409 is an equidigital number, since it uses as much as digits as its factorization.

4645642409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 44.

The square root of 4645642409 is about 68158.9495884436. The cubic root of 4645642409 is about 1668.5859890636.

The spelling of 4645642409 in words is "four billion, six hundred forty-five million, six hundred forty-two thousand, four hundred nine".