169839138491 has 8 divisors (see below), whose sum is σ = 188774892144. Its totient is φ = 151486023520.

The previous prime is 169839138481. The next prime is 169839138499. The reversal of 169839138491 is 194831938961.

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 169839138491 - 2¹⁴ = 169839122107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169839138499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145659056 + ... + 145660221.

It is an arithmetic number, because the mean of its divisors is an integer number (23596861518).

Almost surely, 2^169839138491 is an apocalyptic number.

169839138491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

169839138491 is a deficient number, since it is larger than the sum of its proper divisors (18935753653).

169839138491 is a wasteful number, since it uses less digits than its factorization.

169839138491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291319341.

The product of its digits is 10077696, while the sum is 62.

The spelling of 169839138491 in words is "one hundred sixty-nine billion, eight hundred thirty-nine million, one hundred thirty-eight thousand, four hundred ninety-one".