71556560 has 40 divisors (see below), whose sum is σ = 169917696. Its totient is φ = 28012160.

The previous prime is 71556547. The next prime is 71556577. The reversal of 71556560 is 6565517.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 71556560.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5756 + ... + 13275.

Almost surely, 2^71556560 is an apocalyptic number.

It is an amenable number.

71556560 is an abundant number, since it is smaller than the sum of its proper divisors (98361136).

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

71556560 is a wasteful number, since it uses less digits than its factorization.

71556560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19091 (or 19085 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 71556560 is about 8459.1110644086. Note that the first 3 decimals coincide. The cubic root of 71556560 is about 415.1609382086.

It can be divided in two parts, 715 and 56560, that added together give a palindrome (57275).

The spelling of 71556560 in words is "seventy-one million, five hundred fifty-six thousand, five hundred sixty".