123454556688 has 40 divisors (see below), whose sum is σ = 319147628800. Its totient is φ = 41122698624.

The previous prime is 123454556657. The next prime is 123454556689. The reversal of 123454556688 is 886655454321.

It is not an unprimeable number, because it can be changed into a prime (123454556689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831328 + ... + 968511.

It is an arithmetic number, because the mean of its divisors is an integer number (7978690720).

Almost surely, 2^123454556688 is an apocalyptic number.

It is an amenable number.

123454556688 is an abundant number, since it is smaller than the sum of its proper divisors (195693072112).

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

123454556688 is a wasteful number, since it uses less digits than its factorization.

123454556688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801279 (or 1801273 counting only the distinct ones).

The product of its digits is 27648000, while the sum is 57.

The spelling of 123454556688 in words is "one hundred twenty-three billion, four hundred fifty-four million, five hundred fifty-six thousand, six hundred eighty-eight".