3638462381 has 2 divisors, whose sum is σ = 3638462382. Its totient is φ = 3638462380.

The previous prime is 3638462287. The next prime is 3638462389. The reversal of 3638462381 is 1832648363.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3331021225 + 307441156 = 57715^2 + 17534^2 .

It is a cyclic number.

It is not a de Polignac number, because 3638462381 - 2²⁶ = 3571353517 is a prime.

It is a super-2 number, since 2×3638462381² = 26476816995904378322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3638462389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819231190 + 1819231191.

It is an arithmetic number, because the mean of its divisors is an integer number (1819231191).

Almost surely, 2^3638462381 is an apocalyptic number.

It is an amenable number.

3638462381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3638462381 is an equidigital number, since it uses as much as digits as its factorization.

3638462381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The square root of 3638462381 is about 60319.6682766078. The cubic root of 3638462381 is about 1538.0577049715.

The spelling of 3638462381 in words is "three billion, six hundred thirty-eight million, four hundred sixty-two thousand, three hundred eighty-one".