71161144489 has 8 divisors (see below), whose sum is σ = 71216180000. Its totient is φ = 71106135552.

The previous prime is 71161144477. The next prime is 71161144519. The reversal of 71161144489 is 98444116117.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71161144489 is a prime.

It is a super-2 number, since 2×71161144489² (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 (71161144589) 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, 10895977 + ... + 10902505.

It is an arithmetic number, because the mean of its divisors is an integer number (8902022500).

Almost surely, 2^71161144489 is an apocalyptic number.

It is an amenable number.

71161144489 is a deficient number, since it is larger than the sum of its proper divisors (55035511).

71161144489 is a wasteful number, since it uses less digits than its factorization.

71161144489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13287.

The product of its digits is 193536, while the sum is 46.

The spelling of 71161144489 in words is "seventy-one billion, one hundred sixty-one million, one hundred forty-four thousand, four hundred eighty-nine".