123144010440 has 128 divisors (see below), whose sum is σ = 426723707520. Its totient is φ = 28097024000.

The previous prime is 123144010411. The next prime is 123144010447. The reversal of 123144010440 is 44010441321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 123144010440.

It is not an unprimeable number, because it can be changed into a prime (123144010447) 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, 2721411 + ... + 2766290.

It is an arithmetic number, because the mean of its divisors is an integer number (3333778965).

Almost surely, 2^123144010440 is an apocalyptic number.

123144010440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123144010440 is an abundant number, since it is smaller than the sum of its proper divisors (303579697080).

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

123144010440 is a wasteful number, since it uses less digits than its factorization.

123144010440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5487743 (or 5487739 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 123144010440 its reverse (44010441321), we get a palindrome (167154451761).

The spelling of 123144010440 in words is "one hundred twenty-three billion, one hundred forty-four million, ten thousand, four hundred forty".