4645677221 has 2 divisors, whose sum is σ = 4645677222. Its totient is φ = 4645677220.

The previous prime is 4645677217. The next prime is 4645677277. The reversal of 4645677221 is 1227765464.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2797881025 + 1847796196 = 52895^2 + 42986^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645677221 - 2² = 4645677217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645677121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322838610 + 2322838611.

It is an arithmetic number, because the mean of its divisors is an integer number (2322838611).

Almost surely, 2^4645677221 is an apocalyptic number.

It is an amenable number.

4645677221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645677221 is an equidigital number, since it uses as much as digits as its factorization.

4645677221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 4645677221 is about 68159.2049616191. The cubic root of 4645677221 is about 1668.5901568883.

The spelling of 4645677221 in words is "four billion, six hundred forty-five million, six hundred seventy-seven thousand, two hundred twenty-one".