123645386508 has 48 divisors (see below), whose sum is σ = 329884149504. Its totient is φ = 35309776320.

The previous prime is 123645386467. The next prime is 123645386521. The reversal of 123645386508 is 805683546321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192823 + ... + 533358.

It is an arithmetic number, because the mean of its divisors is an integer number (6872586448).

Almost surely, 2^123645386508 is an apocalyptic number.

It is an amenable number.

123645386508 is an abundant number, since it is smaller than the sum of its proper divisors (206238762996).

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

123645386508 is a wasteful number, since it uses less digits than its factorization.

123645386508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728222 (or 728220 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 51.

The spelling of 123645386508 in words is "one hundred twenty-three billion, six hundred forty-five million, three hundred eighty-six thousand, five hundred eight".