4663642381 has 2 divisors, whose sum is σ = 4663642382. Its totient is φ = 4663642380.

The previous prime is 4663642369. The next prime is 4663642391. The reversal of 4663642381 is 1832463664.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2423986756 + 2239655625 = 49234^2 + 47325^2 .

It is a cyclic number.

It is not a de Polignac number, because 4663642381 - 2⁷ = 4663642253 is a prime.

It is a super-2 number, since 2×4663642381² = 43499120515718698322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4663642391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2331821190 + 2331821191.

It is an arithmetic number, because the mean of its divisors is an integer number (2331821191).

Almost surely, 2^4663642381 is an apocalyptic number.

It is an amenable number.

4663642381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4663642381 is an equidigital number, since it uses as much as digits as its factorization.

4663642381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 43.

The square root of 4663642381 is about 68290.8660144239. The cubic root of 4663642381 is about 1670.7382420955.

The spelling of 4663642381 in words is "four billion, six hundred sixty-three million, six hundred forty-two thousand, three hundred eighty-one".