35440039981 has 2 divisors, whose sum is σ = 35440039982. Its totient is φ = 35440039980.

The previous prime is 35440039949. The next prime is 35440040021. The reversal of 35440039981 is 18993004453.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22390633225 + 13049406756 = 149635^2 + 114234^2 .

It is a cyclic number.

It is not a de Polignac number, because 35440039981 - 2⁵ = 35440039949 is a prime.

It is a super-2 number, since 2×35440039981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35440039931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17720019990 + 17720019991.

It is an arithmetic number, because the mean of its divisors is an integer number (17720019991).

Almost surely, 2^35440039981 is an apocalyptic number.

It is an amenable number.

35440039981 is a deficient number, since it is larger than the sum of its proper divisors (1).

35440039981 is an equidigital number, since it uses as much as digits as its factorization.

35440039981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 35440039981 in words is "thirty-five billion, four hundred forty million, thirty-nine thousand, nine hundred eighty-one".