10445453209 has 3 divisors (see below), whose sum is σ = 10445555413. Its totient is φ = 10445351006.

The previous prime is 10445453149. The next prime is 10445453269. The reversal of 10445453209 is 90235454401.

It is a happy number.

The square root of 10445453209 is 102203.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (10445453149) and next prime (10445453269).

It is a de Polignac number, because none of the positive numbers 2^k-10445453209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10445453269) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 51102 + ... + 153304.

Almost surely, 2^10445453209 is an apocalyptic number.

10445453209 is the 102203-rd square number.

10445453209 is the 51102-nd centered octagonal number.

It is an amenable number.

10445453209 is a deficient number, since it is larger than the sum of its proper divisors (102204).

10445453209 is an frugal number, since it uses more digits than its factorization.

10445453209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204406 (or 102203 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 10445453209 in words is "ten billion, four hundred forty-five million, four hundred fifty-three thousand, two hundred nine".