71575616 has 56 divisors (see below), whose sum is σ = 163348416. Its totient is φ = 30481920.

The previous prime is 71575573. The next prime is 71575639. The reversal of 71575616 is 61657517.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 71575616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87851 + ... + 88661.

It is an arithmetic number, because the mean of its divisors is an integer number (2916936).

Almost surely, 2^71575616 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 71575616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81674208).

71575616 is an abundant number, since it is smaller than the sum of its proper divisors (91772800).

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

71575616 is a wasteful number, since it uses less digits than its factorization.

71575616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1017 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The square root of 71575616 is about 8460.2373489164. The cubic root of 71575616 is about 415.1977883342.

The spelling of 71575616 in words is "seventy-one million, five hundred seventy-five thousand, six hundred sixteen".