123544034311345 has 16 divisors (see below), whose sum is σ = 151965681412608. Its totient is φ = 96363077362560.

The previous prime is 123544034311331. The next prime is 123544034311391. The reversal of 123544034311345 is 543113430445321.

It is not a de Polignac number, because 123544034311345 - 2²¹ = 123544032214193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191974179 + ... + 192616648.

It is an arithmetic number, because the mean of its divisors is an integer number (9497855088288).

Almost surely, 2^{123544034311345} is an apocalyptic number.

It is an amenable number.

123544034311345 is a deficient number, since it is larger than the sum of its proper divisors (28421647101263).

123544034311345 is a wasteful number, since it uses less digits than its factorization.

123544034311345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384592440.

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 123544034311345 its reverse (543113430445321), we get a palindrome (666657464756666).

The spelling of 123544034311345 in words is "one hundred twenty-three trillion, five hundred forty-four billion, thirty-four million, three hundred eleven thousand, three hundred forty-five".