138017650290 has 128 divisors (see below), whose sum is σ = 359952187392. Its totient is φ = 33667418880.

The previous prime is 138017650279. The next prime is 138017650319. The reversal of 138017650290 is 92056710831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19738695 + ... + 19745685.

It is an arithmetic number, because the mean of its divisors is an integer number (2812126464).

Almost surely, 2^138017650290 is an apocalyptic number.

138017650290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138017650290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179976093696).

138017650290 is an abundant number, since it is smaller than the sum of its proper divisors (221934537102).

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

138017650290 is a wasteful number, since it uses less digits than its factorization.

138017650290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7464.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 138017650290 in words is "one hundred thirty-eight billion, seventeen million, six hundred fifty thousand, two hundred ninety".