123402544988 has 12 divisors (see below), whose sum is σ = 223401159240. Its totient is φ = 59573642352.

The previous prime is 123402544957. The next prime is 123402545023. The reversal of 123402544988 is 889445204321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531907406 + ... + 531907637.

It is an arithmetic number, because the mean of its divisors is an integer number (18616763270).

Almost surely, 2^123402544988 is an apocalyptic number.

It is an amenable number.

123402544988 is a deficient number, since it is larger than the sum of its proper divisors (99998614252).

123402544988 is a wasteful number, since it uses less digits than its factorization.

123402544988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063815076 (or 1063815074 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 123402544988 in words is "one hundred twenty-three billion, four hundred two million, five hundred forty-four thousand, nine hundred eighty-eight".