123145563804 has 24 divisors (see below), whose sum is σ = 299832677760. Its totient is φ = 39263802864.

The previous prime is 123145563791. The next prime is 123145563809. The reversal of 123145563804 is 408365541321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123145563809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 223089514 + ... + 223090065.

It is an arithmetic number, because the mean of its divisors is an integer number (12493028240).

Almost surely, 2^123145563804 is an apocalyptic number.

It is an amenable number.

123145563804 is an abundant number, since it is smaller than the sum of its proper divisors (176687113956).

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

123145563804 is a wasteful number, since it uses less digits than its factorization.

123145563804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446179609 (or 446179607 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 123145563804 in words is "one hundred twenty-three billion, one hundred forty-five million, five hundred sixty-three thousand, eight hundred four".