138240969042830 has 32 divisors (see below), whose sum is σ = 254625980213088. Its totient is φ = 54009278668800.

The previous prime is 138240969042821. The next prime is 138240969042877. The reversal of 138240969042830 is 38240969042831.

It is a super-5 number, since 5×138240969042830⁵ (a number of 72 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 138240969042830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17011310 + ... + 23787950.

It is an arithmetic number, because the mean of its divisors is an integer number (7957061881659).

Almost surely, 2^{138240969042830} is an apocalyptic number.

138240969042830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138240969042830 is a deficient number, since it is larger than the sum of its proper divisors (116385011170258).

138240969042830 is a wasteful number, since it uses less digits than its factorization.

138240969042830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824132.

The product of its (nonzero) digits is 17915904, while the sum is 59.

Subtracting from 138240969042830 its reverse (38240969042831), we obtain a palindrome (99999999999999).

The spelling of 138240969042830 in words is "one hundred thirty-eight trillion, two hundred forty billion, nine hundred sixty-nine million, forty-two thousand, eight hundred thirty".