138935121495 has 16 divisors (see below), whose sum is σ = 222313604832. Its totient is φ = 74092928000.

The previous prime is 138935121473. The next prime is 138935121497. The reversal of 138935121495 is 594121539831.

138935121495 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138935121495 - 2⁵ = 138935121463 is a prime.

It is a super-2 number, since 2×138935121495² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138935121497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161202 + ... + 551231.

It is an arithmetic number, because the mean of its divisors is an integer number (13894600302).

Almost surely, 2^138935121495 is an apocalyptic number.

138935121495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138935121495 is a deficient number, since it is larger than the sum of its proper divisors (83378483337).

138935121495 is a wasteful number, since it uses less digits than its factorization.

138935121495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725442.

The product of its digits is 1166400, while the sum is 51.

The spelling of 138935121495 in words is "one hundred thirty-eight billion, nine hundred thirty-five million, one hundred twenty-one thousand, four hundred ninety-five".