138768866650 has 24 divisors (see below), whose sum is σ = 260616024864. Its totient is φ = 54968636400.

The previous prime is 138768866641. The next prime is 138768866669. The reversal of 138768866650 is 56668867831.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13467556 + ... + 13477855.

It is an arithmetic number, because the mean of its divisors is an integer number (10859001036).

Almost surely, 2^138768866650 is an apocalyptic number.

138768866650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138768866650 is a deficient number, since it is larger than the sum of its proper divisors (121847158214).

138768866650 is a wasteful number, since it uses less digits than its factorization.

138768866650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26945526 (or 26945521 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 138768866650 in words is "one hundred thirty-eight billion, seven hundred sixty-eight million, eight hundred sixty-six thousand, six hundred fifty".