123354435140355 has 16 divisors (see below), whose sum is σ = 197367317525664. Its totient is φ = 65788958307840.

The previous prime is 123354435140311. The next prime is 123354435140357. The reversal of 123354435140355 is 553041534453321.

It is a happy number.

It is not a de Polignac number, because 123354435140355 - 2²⁶ = 123354368031491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123354435140357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10895467 + ... + 19115963.

It is an arithmetic number, because the mean of its divisors is an integer number (12335457345354).

Almost surely, 2^{123354435140355} is an apocalyptic number.

123354435140355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123354435140355 is a deficient number, since it is larger than the sum of its proper divisors (74012882385309).

123354435140355 is a wasteful number, since it uses less digits than its factorization.

123354435140355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9220886.

The product of its (nonzero) digits is 6480000, while the sum is 48.

Adding to 123354435140355 its reverse (553041534453321), we get a palindrome (676395969593676).

The spelling of 123354435140355 in words is "one hundred twenty-three trillion, three hundred fifty-four billion, four hundred thirty-five million, one hundred forty thousand, three hundred fifty-five".