138545665050 has 48 divisors (see below), whose sum is σ = 370023504480. Its totient is φ = 34103547840.

The previous prime is 138545665019. The next prime is 138545665061. The reversal of 138545665050 is 50566545831.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35522580 + ... + 35526479.

It is an arithmetic number, because the mean of its divisors is an integer number (7708823010).

Almost surely, 2^138545665050 is an apocalyptic number.

138545665050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138545665050 is an abundant number, since it is smaller than the sum of its proper divisors (231477839430).

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

138545665050 is a wasteful number, since it uses less digits than its factorization.

138545665050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71049087 (or 71049082 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 48.

The spelling of 138545665050 in words is "one hundred thirty-eight billion, five hundred forty-five million, six hundred sixty-five thousand, fifty".