145205554123 has 16 divisors (see below), whose sum is σ = 172874014720. Its totient is φ = 119341965600.

The previous prime is 145205554037. The next prime is 145205554129. The reversal of 145205554123 is 321455502541.

It is a cyclic number.

It is not a de Polignac number, because 145205554123 - 2²⁵ = 145171999691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145205554129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3045843 + ... + 3093148.

It is an arithmetic number, because the mean of its divisors is an integer number (10804625920).

Almost surely, 2^145205554123 is an apocalyptic number.

145205554123 is a deficient number, since it is larger than the sum of its proper divisors (27668460597).

145205554123 is a wasteful number, since it uses less digits than its factorization.

145205554123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139138.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 145205554123 in words is "one hundred forty-five billion, two hundred five million, five hundred fifty-four thousand, one hundred twenty-three".