71645996 has 24 divisors (see below), whose sum is σ = 128136624. Its totient is φ = 35043840.

The previous prime is 71645971. The next prime is 71645999. The reversal of 71645996 is 69954617.

It is a self number, because there is not a number n which added to its sum of digits gives 71645996.

It is not an unprimeable number, because it can be changed into a prime (71645999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37316 + ... + 39188.

It is an arithmetic number, because the mean of its divisors is an integer number (5339026).

Almost surely, 2^71645996 is an apocalyptic number.

It is an amenable number.

71645996 is a deficient number, since it is larger than the sum of its proper divisors (56490628).

71645996 is a wasteful number, since it uses less digits than its factorization.

71645996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081 (or 2079 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 71645996 is about 8464.3957846972. The cubic root of 71645996 is about 415.3338311626. Note that the first 3 decimals are identical.

The spelling of 71645996 in words is "seventy-one million, six hundred forty-five thousand, nine hundred ninety-six".