123638606988 has 24 divisors (see below), whose sum is σ = 310681628208. Its totient is φ = 38042648256.

The previous prime is 123638606977. The next prime is 123638606999. The reversal of 123638606988 is 889606836321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123638606977) and next prime (123638606999).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396277431 + ... + 396277742.

It is an arithmetic number, because the mean of its divisors is an integer number (12945067842).

Almost surely, 2^123638606988 is an apocalyptic number.

It is an amenable number.

123638606988 is an abundant number, since it is smaller than the sum of its proper divisors (187043021220).

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

123638606988 is a wasteful number, since it uses less digits than its factorization.

123638606988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792555193 (or 792555191 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 60.

The spelling of 123638606988 in words is "one hundred twenty-three billion, six hundred thirty-eight million, six hundred six thousand, nine hundred eighty-eight".