138461747250 has 32 divisors (see below), whose sum is σ = 345600523008. Its totient is φ = 36923132400.

The previous prime is 138461747227. The next prime is 138461747251. The reversal of 138461747250 is 52747164831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138461747250.

It is not an unprimeable number, because it can be changed into a prime (138461747251) by changing a digit.

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, 92307082 + ... + 92308581.

It is an arithmetic number, because the mean of its divisors is an integer number (10800016344).

Almost surely, 2^138461747250 is an apocalyptic number.

138461747250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138461747250 is an abundant number, since it is smaller than the sum of its proper divisors (207138775758).

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

138461747250 is a wasteful number, since it uses less digits than its factorization.

138461747250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184615683 (or 184615673 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 138461747250 in words is "one hundred thirty-eight billion, four hundred sixty-one million, seven hundred forty-seven thousand, two hundred fifty".