123705011720 has 32 divisors (see below), whose sum is σ = 278366397120. Its totient is φ = 49476649920.

The previous prime is 123705011699. The next prime is 123705011723. The reversal of 123705011720 is 27110507321.

It is not an unprimeable number, because it can be changed into a prime (123705011723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217859 + ... + 543021.

It is an arithmetic number, because the mean of its divisors is an integer number (8698949910).

Almost surely, 2^123705011720 is an apocalyptic number.

123705011720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123705011720 is an abundant number, since it is smaller than the sum of its proper divisors (154661385400).

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

123705011720 is a wasteful number, since it uses less digits than its factorization.

123705011720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334685 (or 334681 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The spelling of 123705011720 in words is "one hundred twenty-three billion, seven hundred five million, eleven thousand, seven hundred twenty".