72616565 has 16 divisors (see below), whose sum is σ = 100016640. Its totient is φ = 49580160.

The previous prime is 72616561. The next prime is 72616567. The reversal of 72616565 is 56561627.

It is not a de Polignac number, because 72616565 - 2² = 72616561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72616561) 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 15 ways as a sum of consecutive naturals, for example, 4025 + ... + 12705.

It is an arithmetic number, because the mean of its divisors is an integer number (6251040).

Almost surely, 2^72616565 is an apocalyptic number.

It is an amenable number.

72616565 is a deficient number, since it is larger than the sum of its proper divisors (27400075).

72616565 is a wasteful number, since it uses less digits than its factorization.

72616565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932.

The product of its digits is 75600, while the sum is 38.

The square root of 72616565 is about 8521.5353663527. The cubic root of 72616565 is about 417.2008973193.

The spelling of 72616565 in words is "seventy-two million, six hundred sixteen thousand, five hundred sixty-five".