243123454534 has 4 divisors (see below), whose sum is σ = 364685181804. Its totient is φ = 121561727266.

The previous prime is 243123454493. The next prime is 243123454589. The reversal of 243123454534 is 435454321342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 435454321342 = 2 ⋅217727160671.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60780863632 + ... + 60780863635.

It is an arithmetic number, because the mean of its divisors is an integer number (91171295451).

Almost surely, 2^243123454534 is an apocalyptic number.

243123454534 is a deficient number, since it is larger than the sum of its proper divisors (121561727270).

243123454534 is a wasteful number, since it uses less digits than its factorization.

243123454534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121561727269.

The product of its digits is 691200, while the sum is 40.

Adding to 243123454534 its reverse (435454321342), we get a palindrome (678577775876).

The spelling of 243123454534 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred fifty-four thousand, five hundred thirty-four".