10199543449 has 4 divisors (see below), whose sum is σ = 10245281536. Its totient is φ = 10153805364.

The previous prime is 10199543447. The next prime is 10199543467. The reversal of 10199543449 is 94434599101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94434599101 = 523 ⋅180563287.

It is a cyclic number.

It is not a de Polignac number, because 10199543449 - 2¹ = 10199543447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10199543447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22868709 + ... + 22869154.

It is an arithmetic number, because the mean of its divisors is an integer number (2561320384).

Almost surely, 2^10199543449 is an apocalyptic number.

It is an amenable number.

10199543449 is a deficient number, since it is larger than the sum of its proper divisors (45738087).

10199543449 is an equidigital number, since it uses as much as digits as its factorization.

10199543449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45738086.

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 10199543449 in words is "ten billion, one hundred ninety-nine million, five hundred forty-three thousand, four hundred forty-nine".