123660475660720 has 80 divisors (see below), whose sum is σ = 292486296678912. Its totient is φ = 48612980183040.

The previous prime is 123660475660703. The next prime is 123660475660739. The reversal of 123660475660720 is 27066574066321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×123660475660720³ (a number of 43 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36036432 + ... + 39318511.

Almost surely, 2^{123660475660720} is an apocalyptic number.

123660475660720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123660475660720 is an abundant number, since it is smaller than the sum of its proper divisors (168825821018192).

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

123660475660720 is a wasteful number, since it uses less digits than its factorization.

123660475660720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75355310 (or 75355304 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 123660475660720 in words is "one hundred twenty-three trillion, six hundred sixty billion, four hundred seventy-five million, six hundred sixty thousand, seven hundred twenty".