108638250640 has 40 divisors (see below), whose sum is σ = 252743787648. Its totient is φ = 43427798400.

The previous prime is 108638250601. The next prime is 108638250641. The reversal of 108638250640 is 46052836801.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (108638250641) 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, 302286 + ... + 555565.

Almost surely, 2^108638250640 is an apocalyptic number.

108638250640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108638250640 is an abundant number, since it is smaller than the sum of its proper divisors (144105537008).

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

108638250640 is a wasteful number, since it uses less digits than its factorization.

108638250640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859447 (or 859441 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 108638250640 in words is "one hundred eight billion, six hundred thirty-eight million, two hundred fifty thousand, six hundred forty".