123338807772 has 12 divisors (see below), whose sum is σ = 287790551496. Its totient is φ = 41112935920.

The previous prime is 123338807741. The next prime is 123338807777. The reversal of 123338807772 is 277708833321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123338807777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5139116979 + ... + 5139117002.

It is an arithmetic number, because the mean of its divisors is an integer number (23982545958).

Almost surely, 2^123338807772 is an apocalyptic number.

123338807772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123338807772 is an abundant number, since it is smaller than the sum of its proper divisors (164451743724).

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

123338807772 is a wasteful number, since it uses less digits than its factorization.

123338807772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10278233988 (or 10278233986 counting only the distinct ones).

The product of its (nonzero) digits is 2370816, while the sum is 51.

The spelling of 123338807772 in words is "one hundred twenty-three billion, three hundred thirty-eight million, eight hundred seven thousand, seven hundred seventy-two".