123640843876 has 45 divisors (see below), whose sum is σ = 238171063305. Its totient is φ = 56161704720.

The previous prime is 123640843813. The next prime is 123640843913. The reversal of 123640843876 is 678348046321.

The square root of 123640843876 is 351626.

It is a perfect power (a square), and thus also a powerful number.

123640843876 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 120596452900 + 3044390976 = 347270^2 + 55176^2 .

It is a Duffinian number.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 85092766 + ... + 85094218.

Almost surely, 2^123640843876 is an apocalyptic number.

123640843876 is the 351626-th square number.

It is an amenable number.

123640843876 is a deficient number, since it is larger than the sum of its proper divisors (114530219429).

123640843876 is an frugal number, since it uses more digits than its factorization.

123640843876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 123640843876 in words is "one hundred twenty-three billion, six hundred forty million, eight hundred forty-three thousand, eight hundred seventy-six".