138775002690 has 96 divisors (see below), whose sum is σ = 362852061696. Its totient is φ = 33927932160.

The previous prime is 138775002689. The next prime is 138775002763. The reversal of 138775002690 is 96200577831.

It is a super-2 number, since 2×138775002690² (a number of 23 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 129054 + ... + 542406.

It is an arithmetic number, because the mean of its divisors is an integer number (3779708976).

Almost surely, 2^138775002690 is an apocalyptic number.

138775002690 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 138775002690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181426030848).

138775002690 is an abundant number, since it is smaller than the sum of its proper divisors (224077059006).

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

138775002690 is a wasteful number, since it uses less digits than its factorization.

138775002690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413432 (or 413413 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 138775002690 in words is "one hundred thirty-eight billion, seven hundred seventy-five million, two thousand, six hundred ninety".