16385000641 has 2 divisors, whose sum is σ = 16385000642. Its totient is φ = 16385000640.

The previous prime is 16385000633. The next prime is 16385000657. The reversal of 16385000641 is 14600058361.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11492697616 + 4892303025 = 107204^2 + 69945^2 .

It is a cyclic number.

It is not a de Polignac number, because 16385000641 - 2³ = 16385000633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16385000597 and 16385000606.

It is not a weakly prime, because it can be changed into another prime (16385000041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8192500320 + 8192500321.

It is an arithmetic number, because the mean of its divisors is an integer number (8192500321).

Almost surely, 2^16385000641 is an apocalyptic number.

It is an amenable number.

16385000641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16385000641 is an equidigital number, since it uses as much as digits as its factorization.

16385000641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 16385000641 in words is "sixteen billion, three hundred eighty-five million, six hundred forty-one", and thus it is an aban number.