209456432453 has 8 divisors (see below), whose sum is σ = 220158589248. Its totient is φ = 198887221984.

The previous prime is 209456432447. The next prime is 209456432461. The reversal of 209456432453 is 354234654902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 209456432453 - 2¹⁸ = 209456170309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209456432398 and 209456432407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209456438453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33233351 + ... + 33239652.

It is an arithmetic number, because the mean of its divisors is an integer number (27519823656).

Almost surely, 2^209456432453 is an apocalyptic number.

209456432453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

209456432453 is a deficient number, since it is larger than the sum of its proper divisors (10702156795).

209456432453 is a wasteful number, since it uses less digits than its factorization.

209456432453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66473163.

The product of its (nonzero) digits is 3110400, while the sum is 47.

The spelling of 209456432453 in words is "two hundred nine billion, four hundred fifty-six million, four hundred thirty-two thousand, four hundred fifty-three".