35281601981 has 2 divisors, whose sum is σ = 35281601982. Its totient is φ = 35281601980.

The previous prime is 35281601977. The next prime is 35281602011. The reversal of 35281601981 is 18910618253.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34896108025 + 385493956 = 186805^2 + 19634^2 .

It is a cyclic number.

It is not a de Polignac number, because 35281601981 - 2² = 35281601977 is a prime.

It is a super-2 number, since 2×35281601981² (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 (35281601951) 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, 17640800990 + 17640800991.

It is an arithmetic number, because the mean of its divisors is an integer number (17640800991).

Almost surely, 2^35281601981 is an apocalyptic number.

It is an amenable number.

35281601981 is a deficient number, since it is larger than the sum of its proper divisors (1).

35281601981 is an equidigital number, since it uses as much as digits as its factorization.

35281601981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 35281601981 in words is "thirty-five billion, two hundred eighty-one million, six hundred one thousand, nine hundred eighty-one".