123534204253440 has 144 divisors (see below), whose sum is σ = 405200537323008. Its totient is φ = 32052117823488.

The previous prime is 123534204253433. The next prime is 123534204253469. The reversal of 123534204253440 is 44352402435321.

It is a junction number, because it is equal to n+sod(n) for n = 123534204253392 and 123534204253401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 434592592 + ... + 434876751.

Almost surely, 2^{123534204253440} is an apocalyptic number.

123534204253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123534204253440 is an abundant number, since it is smaller than the sum of its proper divisors (281666333069568).

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

123534204253440 is an equidigital number, since it uses as much as digits as its factorization.

123534204253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869469404 (or 869469390 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 42.

Adding to 123534204253440 its reverse (44352402435321), we get a palindrome (167886606688761).

The spelling of 123534204253440 in words is "one hundred twenty-three trillion, five hundred thirty-four billion, two hundred four million, two hundred fifty-three thousand, four hundred forty".