71648145 has 40 divisors (see below), whose sum is σ = 135210240. Its totient is φ = 36197280.

The previous prime is 71648131. The next prime is 71648167. The reversal of 71648145 is 54184617.

It is a happy number.

71648145 is a `hidden beast` number, since 7 + 1 + 648 + 1 + 4 + 5 = 666.

It is not a de Polignac number, because 71648145 - 2⁹ = 71647633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3040 + ... + 12350.

It is an arithmetic number, because the mean of its divisors is an integer number (3380256).

Almost surely, 2^71648145 is an apocalyptic number.

It is an amenable number.

71648145 is a deficient number, since it is larger than the sum of its proper divisors (63562095).

71648145 is a wasteful number, since it uses less digits than its factorization.

71648145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9347 (or 9338 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 71648145 is about 8464.5227272422. The cubic root of 71648145 is about 415.3379837254.

The spelling of 71648145 in words is "seventy-one million, six hundred forty-eight thousand, one hundred forty-five".