243453255545 has 8 divisors (see below), whose sum is σ = 292264791624. Its totient is φ = 194682014464.

The previous prime is 243453255517. The next prime is 243453255587. The reversal of 243453255545 is 545552354342.

It can be written as a sum of positive squares in 4 ways, for example, as 158257569856 + 85195685689 = 397816^2 + 291883^2 .

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 243453255545 - 2¹⁸ = 243452993401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243453255545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10060454 + ... + 10084623.

It is an arithmetic number, because the mean of its divisors is an integer number (36533098953).

Almost surely, 2^243453255545 is an apocalyptic number.

It is an amenable number.

243453255545 is a deficient number, since it is larger than the sum of its proper divisors (48811536079).

243453255545 is a wasteful number, since it uses less digits than its factorization.

243453255545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20147499.

The product of its digits is 7200000, while the sum is 47.

The spelling of 243453255545 in words is "two hundred forty-three billion, four hundred fifty-three million, two hundred fifty-five thousand, five hundred forty-five".