34536513721 has 2 divisors, whose sum is σ = 34536513722. Its totient is φ = 34536513720.

The previous prime is 34536513703. The next prime is 34536513779. The reversal of 34536513721 is 12731563543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34433998096 + 102515625 = 185564^2 + 10125^2 .

It is a cyclic number.

It is not a de Polignac number, because 34536513721 - 2⁵ = 34536513689 is a prime.

It is not a weakly prime, because it can be changed into another prime (34536513521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17268256860 + 17268256861.

It is an arithmetic number, because the mean of its divisors is an integer number (17268256861).

Almost surely, 2^34536513721 is an apocalyptic number.

It is an amenable number.

34536513721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34536513721 is an equidigital number, since it uses as much as digits as its factorization.

34536513721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 40.

The spelling of 34536513721 in words is "thirty-four billion, five hundred thirty-six million, five hundred thirteen thousand, seven hundred twenty-one".