71839098809 has 8 divisors (see below), whose sum is σ = 72504157440. Its totient is φ = 71174149200.

The previous prime is 71839098769. The next prime is 71839098823. The reversal of 71839098809 is 90889093817.

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 71839098809 - 2³² = 67544131513 is a prime.

It is a super-2 number, since 2×71839098809² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71839098839) 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, 1966904 + ... + 2003094.

It is an arithmetic number, because the mean of its divisors is an integer number (9063019680).

Almost surely, 2^71839098809 is an apocalyptic number.

It is an amenable number.

71839098809 is a deficient number, since it is larger than the sum of its proper divisors (665058631).

71839098809 is a wasteful number, since it uses less digits than its factorization.

71839098809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54511.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 71839098809 in words is "seventy-one billion, eight hundred thirty-nine million, ninety-eight thousand, eight hundred nine".