4622655721 has 2 divisors, whose sum is σ = 4622655722. Its totient is φ = 4622655720.

The previous prime is 4622655683. The next prime is 4622655727. The reversal of 4622655721 is 1275562264.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2586841321 + 2035814400 = 50861^2 + 45120^2 .

It is a cyclic number.

It is not a de Polignac number, because 4622655721 - 2⁹ = 4622655209 is a prime.

It is not a weakly prime, because it can be changed into another prime (4622655727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2311327860 + 2311327861.

It is an arithmetic number, because the mean of its divisors is an integer number (2311327861).

Almost surely, 2^4622655721 is an apocalyptic number.

It is an amenable number.

4622655721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4622655721 is an equidigital number, since it uses as much as digits as its factorization.

4622655721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The square root of 4622655721 is about 67990.1148770908. The cubic root of 4622655721 is about 1665.8293770692.

The spelling of 4622655721 in words is "four billion, six hundred twenty-two million, six hundred fifty-five thousand, seven hundred twenty-one".