123345617900 has 36 divisors (see below), whose sum is σ = 276294191040. Its totient is φ = 47746689600.

The previous prime is 123345617821. The next prime is 123345617909. The reversal of 123345617900 is 9716543321.

It is not an unprimeable number, because it can be changed into a prime (123345617909) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19891355 + ... + 19897554.

It is an arithmetic number, because the mean of its divisors is an integer number (7674838640).

Almost surely, 2^123345617900 is an apocalyptic number.

123345617900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123345617900 is an abundant number, since it is smaller than the sum of its proper divisors (152948573140).

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

123345617900 is a wasteful number, since it uses less digits than its factorization.

123345617900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39788954 (or 39788947 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 123345617900 in words is "one hundred twenty-three billion, three hundred forty-five million, six hundred seventeen thousand, nine hundred".