123491310740 has 96 divisors (see below), whose sum is σ = 307127358720. Its totient is φ = 40809452544.

The previous prime is 123491310731. The next prime is 123491310751. The reversal of 123491310740 is 47013194321.

It is a super-3 number, since 3×123491310740³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 123491310740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2357312 + ... + 2409128.

It is an arithmetic number, because the mean of its divisors is an integer number (3199243320).

Almost surely, 2^123491310740 is an apocalyptic number.

123491310740 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 123491310740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153563679360).

123491310740 is an abundant number, since it is smaller than the sum of its proper divisors (183636047980).

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

123491310740 is a wasteful number, since it uses less digits than its factorization.

123491310740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52449 (or 52447 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 123491310740 in words is "one hundred twenty-three billion, four hundred ninety-one million, three hundred ten thousand, seven hundred forty".