243042555497 has 16 divisors (see below), whose sum is σ = 283469136000. Its totient is φ = 208294566480.

The previous prime is 243042555463. The next prime is 243042555523. The reversal of 243042555497 is 794555240342.

It is not a de Polignac number, because 243042555497 - 2¹⁰ = 243042554473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243042555097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2793422 + ... + 2879112.

It is an arithmetic number, because the mean of its divisors is an integer number (17716821000).

Almost surely, 2^243042555497 is an apocalyptic number.

It is an amenable number.

243042555497 is a deficient number, since it is larger than the sum of its proper divisors (40426580503).

243042555497 is an frugal number, since it uses more digits than its factorization.

243042555497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93981 (or 93967 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 50.

The spelling of 243042555497 in words is "two hundred forty-three billion, forty-two million, five hundred fifty-five thousand, four hundred ninety-seven".