123343395840 has 1056 divisors, whose sum is σ = 517494700800. Its totient is φ = 27776286720.

The previous prime is 123343395839. The next prime is 123343395853. The reversal of 123343395840 is 48593343321.

123343395840 is a `hidden beast` number, since 1 + 2 + 3 + 34 + 3 + 39 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 95 ways as a sum of consecutive naturals, for example, 887362491 + ... + 887362629.

It is an arithmetic number, because the mean of its divisors is an integer number (490051800).

Almost surely, 2^123343395840 is an apocalyptic number.

123343395840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123343395840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258747350400).

123343395840 is an abundant number, since it is smaller than the sum of its proper divisors (394151304960).

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

123343395840 is a wasteful number, since it uses less digits than its factorization.

123343395840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 123343395840 in words is "one hundred twenty-three billion, three hundred forty-three million, three hundred ninety-five thousand, eight hundred forty".