35451031981 has 2 divisors, whose sum is σ = 35451031982. Its totient is φ = 35451031980.

The previous prime is 35451031937. The next prime is 35451032053. The reversal of 35451031981 is 18913015453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33830244900 + 1620787081 = 183930^2 + 40259^2 .

It is a cyclic number.

It is not a de Polignac number, because 35451031981 - 2¹⁹ = 35450507693 is a prime.

It is a super-7 number, since 7×35451031981⁷ (a number of 75 digits) contains 7777777 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35451031081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17725515990 + 17725515991.

It is an arithmetic number, because the mean of its divisors is an integer number (17725515991).

Almost surely, 2^35451031981 is an apocalyptic number.

It is an amenable number.

35451031981 is a deficient number, since it is larger than the sum of its proper divisors (1).

35451031981 is an equidigital number, since it uses as much as digits as its factorization.

35451031981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 35451031981 in words is "thirty-five billion, four hundred fifty-one million, thirty-one thousand, nine hundred eighty-one".