10406043649 has 2 divisors, whose sum is σ = 10406043650. Its totient is φ = 10406043648.

The previous prime is 10406043647. The next prime is 10406043653. The reversal of 10406043649 is 94634060401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8375910400 + 2030133249 = 91520^2 + 45057^2 .

It is a cyclic number.

It is not a de Polignac number, because 10406043649 - 2¹ = 10406043647 is a prime.

Together with 10406043647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10406043647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5203021824 + 5203021825.

It is an arithmetic number, because the mean of its divisors is an integer number (5203021825).

Almost surely, 2^10406043649 is an apocalyptic number.

It is an amenable number.

10406043649 is a deficient number, since it is larger than the sum of its proper divisors (1).

10406043649 is an equidigital number, since it uses as much as digits as its factorization.

10406043649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 10406043649 in words is "ten billion, four hundred six million, forty-three thousand, six hundred forty-nine".