138679168550 has 192 divisors, whose sum is σ = 300136415040. Its totient is φ = 47218360320.

The previous prime is 138679168519. The next prime is 138679168553. The reversal of 138679168550 is 55861976831.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 138679168550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138679168553) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 116831057 + ... + 116832243.

It is an arithmetic number, because the mean of its divisors is an integer number (1563210495).

Almost surely, 2^138679168550 is an apocalyptic number.

138679168550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138679168550 is an abundant number, since it is smaller than the sum of its proper divisors (161457246490).

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

138679168550 is a wasteful number, since it uses less digits than its factorization.

138679168550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 138679168550 in words is "one hundred thirty-eight billion, six hundred seventy-nine million, one hundred sixty-eight thousand, five hundred fifty".