4645643623 has 2 divisors, whose sum is σ = 4645643624. Its totient is φ = 4645643622.

The previous prime is 4645643591. The next prime is 4645643641. The reversal of 4645643623 is 3263465464.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4645643623 - 2⁵ = 4645643591 is a prime.

It is a super-2 number, since 2×4645643623² = 43164009343841132258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4645643623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645643323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322821811 + 2322821812.

It is an arithmetic number, because the mean of its divisors is an integer number (2322821812).

Almost surely, 2^4645643623 is an apocalyptic number.

4645643623 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645643623 is an equidigital number, since it uses as much as digits as its factorization.

4645643623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 43.

The square root of 4645643623 is about 68158.9584940967. The cubic root of 4645643623 is about 1668.5861344086.

The spelling of 4645643623 in words is "four billion, six hundred forty-five million, six hundred forty-three thousand, six hundred twenty-three".