71616398389 has 8 divisors (see below), whose sum is σ = 75851049240. Its totient is φ = 67384183296.

The previous prime is 71616398387. The next prime is 71616398393. The reversal of 71616398389 is 98389361617.

It can be written as a sum of positive squares in 4 ways, for example, as 4592366289 + 67024032100 = 67767^2 + 258890^2 .

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

It is not a de Polignac number, because 71616398389 - 2¹ = 71616398387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71616398383) 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, 548224 + ... + 666169.

It is an arithmetic number, because the mean of its divisors is an integer number (9481381155).

Almost surely, 2^71616398389 is an apocalyptic number.

It is an amenable number.

71616398389 is a deficient number, since it is larger than the sum of its proper divisors (4234650851).

71616398389 is a wasteful number, since it uses less digits than its factorization.

71616398389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217879.

The product of its digits is 11757312, while the sum is 61.

The spelling of 71616398389 in words is "seventy-one billion, six hundred sixteen million, three hundred ninety-eight thousand, three hundred eighty-nine".