71543837172 has 48 divisors (see below), whose sum is σ = 175057727040. Its totient is φ = 22710175488.

The previous prime is 71543837111. The next prime is 71543837173. The reversal of 71543837172 is 27173834517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71543837173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1382718 + ... + 1433525.

It is an arithmetic number, because the mean of its divisors is an integer number (3647035980).

Almost surely, 2^71543837172 is an apocalyptic number.

It is an amenable number.

71543837172 is an abundant number, since it is smaller than the sum of its proper divisors (103513889868).

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

71543837172 is a wasteful number, since it uses less digits than its factorization.

71543837172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816352 (or 2816350 counting only the distinct ones).

The product of its digits is 987840, while the sum is 48.

The spelling of 71543837172 in words is "seventy-one billion, five hundred forty-three million, eight hundred thirty-seven thousand, one hundred seventy-two".