138506049510 has 32 divisors (see below), whose sum is σ = 332424660960. Its totient is φ = 36933819648.

The previous prime is 138506049433. The next prime is 138506049541. The reversal of 138506049510 is 15940605831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1512306 + ... + 1601274.

It is an arithmetic number, because the mean of its divisors is an integer number (10388270655).

Almost surely, 2^138506049510 is an apocalyptic number.

138506049510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138506049510 is an abundant number, since it is smaller than the sum of its proper divisors (193918611450).

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

138506049510 is a wasteful number, since it uses less digits than its factorization.

138506049510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140872.

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 138506049510 in words is "one hundred thirty-eight billion, five hundred six million, forty-nine thousand, five hundred ten".