16435635641 has 2 divisors, whose sum is σ = 16435635642. Its totient is φ = 16435635640.

The previous prime is 16435635631. The next prime is 16435635673. The reversal of 16435635641 is 14653653461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16435240000 + 395641 = 128200^2 + 629^2 .

It is a cyclic number.

It is not a de Polignac number, because 16435635641 - 2¹⁸ = 16435373497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16435635592 and 16435635601.

It is not a weakly prime, because it can be changed into another prime (16435635611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8217817820 + 8217817821.

It is an arithmetic number, because the mean of its divisors is an integer number (8217817821).

Almost surely, 2^16435635641 is an apocalyptic number.

It is an amenable number.

16435635641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16435635641 is an equidigital number, since it uses as much as digits as its factorization.

16435635641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 44.

The spelling of 16435635641 in words is "sixteen billion, four hundred thirty-five million, six hundred thirty-five thousand, six hundred forty-one".