4645638157 has 2 divisors, whose sum is σ = 4645638158. Its totient is φ = 4645638156.

The previous prime is 4645638017. The next prime is 4645638191. The reversal of 4645638157 is 7518365464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4630938601 + 14699556 = 68051^2 + 3834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4645638157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4645638157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645638457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322819078 + 2322819079.

It is an arithmetic number, because the mean of its divisors is an integer number (2322819079).

Almost surely, 2^4645638157 is an apocalyptic number.

It is an amenable number.

4645638157 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645638157 is an equidigital number, since it uses as much as digits as its factorization.

4645638157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 49.

The square root of 4645638157 is about 68158.9183966412. The cubic root of 4645638157 is about 1668.5854799966.

The spelling of 4645638157 in words is "four billion, six hundred forty-five million, six hundred thirty-eight thousand, one hundred fifty-seven".