4545691649 has 2 divisors, whose sum is σ = 4545691650. Its totient is φ = 4545691648.

The previous prime is 4545691609. The next prime is 4545691699. The reversal of 4545691649 is 9461965454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2724109249 + 1821582400 = 52193^2 + 42680^2 .

It is a cyclic number.

It is not a de Polignac number, because 4545691649 - 2⁸ = 4545691393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4545691649.

It is not a weakly prime, because it can be changed into another prime (4545691609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2272845824 + 2272845825.

It is an arithmetic number, because the mean of its divisors is an integer number (2272845825).

Almost surely, 2^4545691649 is an apocalyptic number.

It is an amenable number.

4545691649 is a deficient number, since it is larger than the sum of its proper divisors (1).

4545691649 is an equidigital number, since it uses as much as digits as its factorization.

4545691649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

The square root of 4545691649 is about 67421.7446303490. The cubic root of 4545691649 is about 1656.5326144737.

The spelling of 4545691649 in words is "four billion, five hundred forty-five million, six hundred ninety-one thousand, six hundred forty-nine".