138257788530 has 32 divisors (see below), whose sum is σ = 351337440384. Its totient is φ = 34699993856.

The previous prime is 138257788517. The next prime is 138257788597. The reversal of 138257788530 is 35887752831.

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 15 ways as a sum of consecutive naturals, for example, 135546342 + ... + 135547361.

It is an arithmetic number, because the mean of its divisors is an integer number (10979295012).

Almost surely, 2^138257788530 is an apocalyptic number.

138257788530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138257788530 is an abundant number, since it is smaller than the sum of its proper divisors (213079651854).

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

138257788530 is a wasteful number, since it uses less digits than its factorization.

138257788530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271093730.

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 138257788530 in words is "one hundred thirty-eight billion, two hundred fifty-seven million, seven hundred eighty-eight thousand, five hundred thirty".