1609090971839 has 4 divisors (see below), whose sum is σ = 1732867200456. Its totient is φ = 1485314743224.

The previous prime is 1609090971821. The next prime is 1609090971857. The reversal of 1609090971839 is 9381790909061.

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

It is an interprime number because it is at equal distance from previous prime (1609090971821) and next prime (1609090971857).

It is not a de Polignac number, because 1609090971839 - 2²⁰ = 1609089923263 is a prime.

It is a super-3 number, since 3×1609090971839³ (a number of 38 digits) contains 333 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 (1609090971809) 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, 61888114289 + ... + 61888114314.

It is an arithmetic number, because the mean of its divisors is an integer number (433216800114).

Almost surely, 2^{1609090971839} is an apocalyptic number.

1609090971839 is a deficient number, since it is larger than the sum of its proper divisors (123776228617).

1609090971839 is a wasteful number, since it uses less digits than its factorization.

1609090971839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123776228616.

The product of its (nonzero) digits is 6613488, while the sum is 62.

The spelling of 1609090971839 in words is "one trillion, six hundred nine billion, ninety million, nine hundred seventy-one thousand, eight hundred thirty-nine".