138632620050 has 36 divisors (see below), whose sum is σ = 372459640410. Its totient is φ = 36968698560.

The previous prime is 138632619997. The next prime is 138632620109. The reversal of 138632620050 is 50026236831.

It is a happy number.

138632620050 is a `hidden beast` number, since 1 + 3 + 86 + 326 + 200 + 50 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 79512156441 + 59120463609 = 281979^2 + 243147^2 .

It is a junction number, because it is equal to n+sod(n) for n = 138632619987 and 138632620014.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 154035795 + ... + 154036694.

Almost surely, 2^138632620050 is an apocalyptic number.

138632620050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138632620050 is an abundant number, since it is smaller than the sum of its proper divisors (233827020360).

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

138632620050 is a wasteful number, since it uses less digits than its factorization.

138632620050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308072507 (or 308072499 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 138632620050 its reverse (50026236831), we get a palindrome (188658856881).

The spelling of 138632620050 in words is "one hundred thirty-eight billion, six hundred thirty-two million, six hundred twenty thousand, fifty".