71536648 has 8 divisors (see below), whose sum is σ = 134131230. Its totient is φ = 35768320.

The previous prime is 71536643. The next prime is 71536657. The reversal of 71536648 is 84663517.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66879684 + 4656964 = 8178^2 + 2158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 71536648.

It is not an unprimeable number, because it can be changed into a prime (71536643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4471033 + ... + 4471048.

Almost surely, 2^71536648 is an apocalyptic number.

It is an amenable number.

71536648 is a deficient number, since it is larger than the sum of its proper divisors (62594582).

71536648 is a wasteful number, since it uses less digits than its factorization.

71536648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8942087 (or 8942083 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 71536648 is about 8457.9340266994. The cubic root of 71536648 is about 415.1224257764.

The spelling of 71536648 in words is "seventy-one million, five hundred thirty-six thousand, six hundred forty-eight".