10509840449 has 2 divisors, whose sum is σ = 10509840450. Its totient is φ = 10509840448.

The previous prime is 10509840437. The next prime is 10509840499. The reversal of 10509840449 is 94404890501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8866105600 + 1643734849 = 94160^2 + 40543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10509840449 is a prime.

It is a super-2 number, since 2×10509840449² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10509840499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5254920224 + 5254920225.

It is an arithmetic number, because the mean of its divisors is an integer number (5254920225).

Almost surely, 2^10509840449 is an apocalyptic number.

It is an amenable number.

10509840449 is a deficient number, since it is larger than the sum of its proper divisors (1).

10509840449 is an equidigital number, since it uses as much as digits as its factorization.

10509840449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 10509840449 in words is "ten billion, five hundred nine million, eight hundred forty thousand, four hundred forty-nine".