138661835395 has 8 divisors (see below), whose sum is σ = 166398731856. Its totient is φ = 110926448736.

The previous prime is 138661835339. The next prime is 138661835443. The reversal of 138661835395 is 593538166831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138661835395 - 2¹³ = 138661827203 is a prime.

It is a super-2 number, since 2×138661835395² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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, 164472 + ... + 551701.

It is an arithmetic number, because the mean of its divisors is an integer number (20799841482).

Almost surely, 2^138661835395 is an apocalyptic number.

138661835395 is a deficient number, since it is larger than the sum of its proper divisors (27736896461).

138661835395 is an equidigital number, since it uses as much as digits as its factorization.

138661835395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754901.

The product of its digits is 13996800, while the sum is 58.

The spelling of 138661835395 in words is "one hundred thirty-eight billion, six hundred sixty-one million, eight hundred thirty-five thousand, three hundred ninety-five".