123545520433219 has 2 divisors, whose sum is σ = 123545520433220. Its totient is φ = 123545520433218.

The previous prime is 123545520433217. The next prime is 123545520433241. The reversal of 123545520433219 is 912334025545321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123545520433219 - 2¹ = 123545520433217 is a prime.

It is a super-2 number, since 2×123545520433219² (a number of 29 digits) contains 22 as substring.

Together with 123545520433217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (123545520433213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61772760216609 + 61772760216610.

It is an arithmetic number, because the mean of its divisors is an integer number (61772760216610).

Almost surely, 2^{123545520433219} is an apocalyptic number.

123545520433219 is a deficient number, since it is larger than the sum of its proper divisors (1).

123545520433219 is an equidigital number, since it uses as much as digits as its factorization.

123545520433219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 123545520433219 in words is "one hundred twenty-three trillion, five hundred forty-five billion, five hundred twenty million, four hundred thirty-three thousand, two hundred nineteen".