72565791 has 8 divisors (see below), whose sum is σ = 98813184. Its totient is φ = 47347800.

The previous prime is 72565789. The next prime is 72565793. The reversal of 72565791 is 19756527.

It is an interprime number because it is at equal distance from previous prime (72565789) and next prime (72565793).

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

It is not a de Polignac number, because 72565791 - 2¹ = 72565789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72565793) 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, 257185 + ... + 257466.

It is an arithmetic number, because the mean of its divisors is an integer number (12351648).

Almost surely, 2^72565791 is an apocalyptic number.

72565791 is a deficient number, since it is larger than the sum of its proper divisors (26247393).

72565791 is a wasteful number, since it uses less digits than its factorization.

72565791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514701.

The product of its digits is 132300, while the sum is 42.

The square root of 72565791 is about 8518.5556874390. Note that the first 3 decimals coincide. The cubic root of 72565791 is about 417.1036380720.

The spelling of 72565791 in words is "seventy-two million, five hundred sixty-five thousand, seven hundred ninety-one".