12453890409 has 9 divisors (see below), whose sum is σ = 17989436413. Its totient is φ = 8302370412.

The previous prime is 12453890389. The next prime is 12453890443. The reversal of 12453890409 is 90409835421.

The square root of 12453890409 is 111597.

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

12453890409 is a `hidden beast` number, since 1 + 24 + 538 + 90 + 4 + 0 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 12453890409 - 2¹⁵ = 12453857641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12453890909) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 316192 + ... + 353390.

Almost surely, 2^12453890409 is an apocalyptic number.

12453890409 is the 111597-th square number.

12453890409 is the 55799-th centered octagonal number.

It is an amenable number.

12453890409 is a deficient number, since it is larger than the sum of its proper divisors (5535546004).

12453890409 is an frugal number, since it uses more digits than its factorization.

12453890409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74404 (or 37202 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 12453890409 in words is "twelve billion, four hundred fifty-three million, eight hundred ninety thousand, four hundred nine".