35688433721 has 2 divisors, whose sum is σ = 35688433722. Its totient is φ = 35688433720.

The previous prime is 35688433679. The next prime is 35688433801. The reversal of 35688433721 is 12733488653.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28989829696 + 6698604025 = 170264^2 + 81845^2 .

It is a cyclic number.

It is not a de Polignac number, because 35688433721 - 2¹⁸ = 35688171577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 35688433721.

It is not a weakly prime, because it can be changed into another prime (35688432721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17844216860 + 17844216861.

It is an arithmetic number, because the mean of its divisors is an integer number (17844216861).

Almost surely, 2^35688433721 is an apocalyptic number.

It is an amenable number.

35688433721 is a deficient number, since it is larger than the sum of its proper divisors (1).

35688433721 is an equidigital number, since it uses as much as digits as its factorization.

35688433721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 50.

The spelling of 35688433721 in words is "thirty-five billion, six hundred eighty-eight million, four hundred thirty-three thousand, seven hundred twenty-one".