138142104871 has 4 divisors (see below), whose sum is σ = 141511424544. Its totient is φ = 134772785200.

The previous prime is 138142104857. The next prime is 138142104917. The reversal of 138142104871 is 178401241831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138142104871 - 2¹⁷ = 138141973799 is a prime.

It is a super-2 number, since 2×138142104871² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138142104851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684659775 + ... + 1684659856.

It is an arithmetic number, because the mean of its divisors is an integer number (35377856136).

Almost surely, 2^138142104871 is an apocalyptic number.

138142104871 is a deficient number, since it is larger than the sum of its proper divisors (3369319673).

138142104871 is an equidigital number, since it uses as much as digits as its factorization.

138142104871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369319672.

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 138142104871 in words is "one hundred thirty-eight billion, one hundred forty-two million, one hundred four thousand, eight hundred seventy-one".