7636733981 has 2 divisors, whose sum is σ = 7636733982. Its totient is φ = 7636733980.

The previous prime is 7636733963. The next prime is 7636734031. The reversal of 7636733981 is 1893376367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7355635225 + 281098756 = 85765^2 + 16766^2 .

It is a cyclic number.

It is not a de Polignac number, because 7636733981 - 2⁶ = 7636733917 is a prime.

It is a super-2 number, since 2×7636733981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7636733921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3818366990 + 3818366991.

It is an arithmetic number, because the mean of its divisors is an integer number (3818366991).

Almost surely, 2^7636733981 is an apocalyptic number.

It is an amenable number.

7636733981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7636733981 is an equidigital number, since it uses as much as digits as its factorization.

7636733981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 53.

The square root of 7636733981 is about 87388.4087336530. The cubic root of 7636733981 is about 1969.2577086948.

The spelling of 7636733981 in words is "seven billion, six hundred thirty-six million, seven hundred thirty-three thousand, nine hundred eighty-one".