71645648 has 20 divisors (see below), whose sum is σ = 139157760. Its totient is φ = 35733984.

The previous prime is 71645641. The next prime is 71645669. The reversal of 71645648 is 84654617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71645641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361 + ... + 12047.

It is an arithmetic number, because the mean of its divisors is an integer number (6957888).

Almost surely, 2^71645648 is an apocalyptic number.

It is an amenable number.

71645648 is a deficient number, since it is larger than the sum of its proper divisors (67512112).

71645648 is a wasteful number, since it uses less digits than its factorization.

71645648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11114 (or 11108 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 71645648 is about 8464.3752279775. The cubic root of 71645648 is about 415.3331587063. Note that the first 3 decimals are identical.

It can be divided in two parts, 716 and 45648, that added together give a palindrome (46364).

The spelling of 71645648 in words is "seventy-one million, six hundred forty-five thousand, six hundred forty-eight".