123404205511145 has 32 divisors (see below), whose sum is σ = 166419550370304. Its totient is φ = 87162090048000.

The previous prime is 123404205511141. The next prime is 123404205511177. The reversal of 123404205511145 is 541115502404321.

It is not a de Polignac number, because 123404205511145 - 2² = 123404205511141 is a prime.

It is a super-2 number, since 2×123404205511145² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123404205511099 and 123404205511108.

It is not an unprimeable number, because it can be changed into a prime (123404205511141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23642660 + ... + 28386330.

It is an arithmetic number, because the mean of its divisors is an integer number (5200610949072).

Almost surely, 2^{123404205511145} is an apocalyptic number.

It is an amenable number.

123404205511145 is a deficient number, since it is larger than the sum of its proper divisors (43015344859159).

123404205511145 is a wasteful number, since it uses less digits than its factorization.

123404205511145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761113.

The product of its (nonzero) digits is 96000, while the sum is 38.

Adding to 123404205511145 its reverse (541115502404321), we get a palindrome (664519707915466).

The spelling of 123404205511145 in words is "one hundred twenty-three trillion, four hundred four billion, two hundred five million, five hundred eleven thousand, one hundred forty-five".