71650565 has 8 divisors (see below), whose sum is σ = 98263680. Its totient is φ = 49131792.

The previous prime is 71650549. The next prime is 71650567. The reversal of 71650565 is 56505617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71650565 - 2⁴ = 71650549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 2047159 = 71650565 / (7 + 1 + 6 + 5 + 0 + 5 + 6 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71650567) 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, 1023545 + ... + 1023614.

It is an arithmetic number, because the mean of its divisors is an integer number (12282960).

Almost surely, 2^71650565 is an apocalyptic number.

It is an amenable number.

71650565 is a deficient number, since it is larger than the sum of its proper divisors (26613115).

71650565 is a wasteful number, since it uses less digits than its factorization.

71650565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047171.

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

The square root of 71650565 is about 8464.6656756189. The cubic root of 71650565 is about 415.3426598483.

The spelling of 71650565 in words is "seventy-one million, six hundred fifty thousand, five hundred sixty-five".