138786430250 has 32 divisors (see below), whose sum is σ = 279793449936. Its totient is φ = 51244219200.

The previous prime is 138786430231. The next prime is 138786430309. The reversal of 138786430250 is 52034687831.

It can be written as a sum of positive squares in 8 ways, for example, as 4369606609 + 134416823641 = 66103^2 + 366629^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138786430195 and 138786430204.

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, 21348509 + ... + 21355008.

Almost surely, 2^138786430250 is an apocalyptic number.

138786430250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138786430250 is an abundant number, since it is smaller than the sum of its proper divisors (141007019686).

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

138786430250 is a wasteful number, since it uses less digits than its factorization.

138786430250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42703547 (or 42703537 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 138786430250 in words is "one hundred thirty-eight billion, seven hundred eighty-six million, four hundred thirty thousand, two hundred fifty".