123066344440 has 32 divisors (see below), whose sum is σ = 298199220480. Its totient is φ = 45439880832.

The previous prime is 123066344419. The next prime is 123066344441. The reversal of 123066344440 is 44443660321.

It is a self number, because there is not a number n which added to its sum of digits gives 123066344440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123066344441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118332504 + ... + 118333543.

It is an arithmetic number, because the mean of its divisors is an integer number (9318725640).

Almost surely, 2^123066344440 is an apocalyptic number.

123066344440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123066344440 is an abundant number, since it is smaller than the sum of its proper divisors (175132876040).

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

123066344440 is a wasteful number, since it uses less digits than its factorization.

123066344440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236666071 (or 236666067 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 37.

The spelling of 123066344440 in words is "one hundred twenty-three billion, sixty-six million, three hundred forty-four thousand, four hundred forty".