123545242020433 has 2 divisors, whose sum is σ = 123545242020434. Its totient is φ = 123545242020432.

The previous prime is 123545242020377. The next prime is 123545242020491. The reversal of 123545242020433 is 334020242545321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68806892280064 + 54738349740369 = 8294992^2 + 7398537^2 .

It is an emirp because it is prime and its reverse (334020242545321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123545242020433 is a prime.

It is not a weakly prime, because it can be changed into another prime (123545242020833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61772621010216 + 61772621010217.

It is an arithmetic number, because the mean of its divisors is an integer number (61772621010217).

Almost surely, 2^{123545242020433} is an apocalyptic number.

It is an amenable number.

123545242020433 is a deficient number, since it is larger than the sum of its proper divisors (1).

123545242020433 is an equidigital number, since it uses as much as digits as its factorization.

123545242020433 is an evil number, because the sum of its binary digits is even.

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

Adding to 123545242020433 its reverse (334020242545321), we get a palindrome (457565484565754).

The spelling of 123545242020433 in words is "one hundred twenty-three trillion, five hundred forty-five billion, two hundred forty-two million, twenty thousand, four hundred thirty-three".