71123210844 has 96 divisors (see below), whose sum is σ = 198538002432. Its totient is φ = 19388376000.

The previous prime is 71123210839. The next prime is 71123210857. The reversal of 71123210844 is 44801232117.

It is a super-2 number, since 2×71123210844² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7462 + ... + 377229.

It is an arithmetic number, because the mean of its divisors is an integer number (2068104192).

Almost surely, 2^71123210844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71123210844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99269001216).

71123210844 is an abundant number, since it is smaller than the sum of its proper divisors (127414791588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71123210844 is a wasteful number, since it uses less digits than its factorization.

71123210844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384807 (or 384805 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The spelling of 71123210844 in words is "seventy-one billion, one hundred twenty-three million, two hundred ten thousand, eight hundred forty-four".