3652818581 has 2 divisors, whose sum is σ = 3652818582. Its totient is φ = 3652818580.

The previous prime is 3652818563. The next prime is 3652818593. The reversal of 3652818581 is 1858182563.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3415350481 + 237468100 = 58441^2 + 15410^2 .

It is a cyclic number.

It is not a de Polignac number, because 3652818581 - 2⁶ = 3652818517 is a prime.

It is a super-2 number, since 2×3652818581² = 26686167171397707122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3652818181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1826409290 + 1826409291.

It is an arithmetic number, because the mean of its divisors is an integer number (1826409291).

Almost surely, 2^3652818581 is an apocalyptic number.

It is an amenable number.

3652818581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3652818581 is an equidigital number, since it uses as much as digits as its factorization.

3652818581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 47.

The square root of 3652818581 is about 60438.5521087327. The cubic root of 3652818581 is about 1540.0779435728.

The spelling of 3652818581 in words is "three billion, six hundred fifty-two million, eight hundred eighteen thousand, five hundred eighty-one".