71532645 has 16 divisors (see below), whose sum is σ = 119428992. Its totient is φ = 36491840.

The previous prime is 71532619. The next prime is 71532649. The reversal of 71532645 is 54623517.

It is not a de Polignac number, because 71532645 - 2¹⁷ = 71401573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71532649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103326 + ... + 104015.

It is an arithmetic number, because the mean of its divisors is an integer number (7464312).

Almost surely, 2^71532645 is an apocalyptic number.

It is an amenable number.

71532645 is a deficient number, since it is larger than the sum of its proper divisors (47896347).

71532645 is a wasteful number, since it uses less digits than its factorization.

71532645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207372.

The product of its digits is 25200, while the sum is 33.

The square root of 71532645 is about 8457.6973816755. The cubic root of 71532645 is about 415.1146825841.

The spelling of 71532645 in words is "seventy-one million, five hundred thirty-two thousand, six hundred forty-five".