123135172752 has 80 divisors (see below), whose sum is σ = 336937577472. Its totient is φ = 38616115200.

The previous prime is 123135172723. The next prime is 123135172753. The reversal of 123135172752 is 257271531321.

It is a self number, because there is not a number n which added to its sum of digits gives 123135172752.

It is not an unprimeable number, because it can be changed into a prime (123135172753) 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 15 ways as a sum of consecutive naturals, for example, 2255377 + ... + 2309327.

Almost surely, 2^123135172752 is an apocalyptic number.

123135172752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123135172752 is an abundant number, since it is smaller than the sum of its proper divisors (213802404720).

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

123135172752 is a wasteful number, since it uses less digits than its factorization.

123135172752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56776 (or 56770 counting only the distinct ones).

The product of its digits is 88200, while the sum is 39.

The spelling of 123135172752 in words is "one hundred twenty-three billion, one hundred thirty-five million, one hundred seventy-two thousand, seven hundred fifty-two".