72565718 has 4 divisors (see below), whose sum is σ = 108848580. Its totient is φ = 36282858.

The previous prime is 72565657. The next prime is 72565733. The reversal of 72565718 is 81756527.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18141428 + ... + 18141431.

It is an arithmetic number, because the mean of its divisors is an integer number (27212145).

Almost surely, 2^72565718 is an apocalyptic number.

72565718 is a deficient number, since it is larger than the sum of its proper divisors (36282862).

72565718 is a wasteful number, since it uses less digits than its factorization.

72565718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36282861.

The product of its digits is 117600, while the sum is 41.

The square root of 72565718 is about 8518.5514026740. The cubic root of 72565718 is about 417.1034982054.

The spelling of 72565718 in words is "seventy-two million, five hundred sixty-five thousand, seven hundred eighteen".