138754715550 has 192 divisors, whose sum is σ = 386153070336. Its totient is φ = 32681779200.

The previous prime is 138754715549. The next prime is 138754715579. The reversal of 138754715550 is 55517457831.

It is a super-2 number, since 2×138754715550² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138754715493 and 138754715502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13688284 + ... + 13698416.

It is an arithmetic number, because the mean of its divisors is an integer number (2011213908).

Almost surely, 2^138754715550 is an apocalyptic number.

138754715550 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 138754715550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193076535168).

138754715550 is an abundant number, since it is smaller than the sum of its proper divisors (247398354786).

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

138754715550 is a wasteful number, since it uses less digits than its factorization.

138754715550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10395 (or 10390 counting only the distinct ones).

The product of its (nonzero) digits is 2940000, while the sum is 51.

The spelling of 138754715550 in words is "one hundred thirty-eight billion, seven hundred fifty-four million, seven hundred fifteen thousand, five hundred fifty".