138630235956340 has 24 divisors (see below), whose sum is σ = 291128598802440. Its totient is φ = 55451122326528.

The previous prime is 138630235956323. The next prime is 138630235956371. The reversal of 138630235956340 is 43659532036831.

It can be written as a sum of positive squares in 4 ways, for example, as 44775449570916 + 93854786385424 = 6691446^2 + 9687868^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59583505 + ... + 61866424.

It is an arithmetic number, because the mean of its divisors is an integer number (12130358283435).

Almost surely, 2^{138630235956340} is an apocalyptic number.

138630235956340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138630235956340 is an abundant number, since it is smaller than the sum of its proper divisors (152498362846100).

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

138630235956340 is a wasteful number, since it uses less digits than its factorization.

138630235956340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121507011 (or 121507009 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 58.

The spelling of 138630235956340 in words is "one hundred thirty-eight trillion, six hundred thirty billion, two hundred thirty-five million, nine hundred fifty-six thousand, three hundred forty".