123345510254440 has 32 divisors (see below), whose sum is σ = 292134103236000. Its totient is φ = 46741456517184.

The previous prime is 123345510254411. The next prime is 123345510254441. The reversal of 123345510254440 is 44452015543321.

It is a happy number.

It is a super-2 number, since 2×123345510254440² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123345510254441) 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 7 ways as a sum of consecutive naturals, for example, 81148361250 + ... + 81148362769.

It is an arithmetic number, because the mean of its divisors is an integer number (9129190726125).

Almost surely, 2^{123345510254440} is an apocalyptic number.

123345510254440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123345510254440 is an abundant number, since it is smaller than the sum of its proper divisors (168788592981560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123345510254440 is a wasteful number, since it uses less digits than its factorization.

123345510254440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162296724049 (or 162296724045 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 123345510254440 its reverse (44452015543321), we get a palindrome (167797525797761).

The spelling of 123345510254440 in words is "one hundred twenty-three trillion, three hundred forty-five billion, five hundred ten million, two hundred fifty-four thousand, four hundred forty".