123206402646 has 16 divisors (see below), whose sum is σ = 273792006000. Its totient is φ = 41068800864.

The previous prime is 123206402639. The next prime is 123206402677. The reversal of 123206402646 is 646204602321.

123206402646 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 0 + 6 + 4 + 0 + 2 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 123206402646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140799971 + ... + 1140800078.

It is an arithmetic number, because the mean of its divisors is an integer number (17112000375).

Almost surely, 2^123206402646 is an apocalyptic number.

123206402646 is an abundant number, since it is smaller than the sum of its proper divisors (150585603354).

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

123206402646 is a wasteful number, since it uses less digits than its factorization.

123206402646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281600060 (or 2281600054 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 123206402646 in words is "one hundred twenty-three billion, two hundred six million, four hundred two thousand, six hundred forty-six".