73812565 has 4 divisors (see below), whose sum is σ = 88575084. Its totient is φ = 59050048.

The previous prime is 73812547. The next prime is 73812577. The reversal of 73812565 is 56521837.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41447844 + 32364721 = 6438^2 + 5689^2 .

It is a cyclic number.

It is not a de Polignac number, because 73812565 - 2⁵ = 73812533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7381252 + ... + 7381261.

It is an arithmetic number, because the mean of its divisors is an integer number (22143771).

Almost surely, 2^73812565 is an apocalyptic number.

It is an amenable number.

73812565 is a deficient number, since it is larger than the sum of its proper divisors (14762519).

73812565 is a wasteful number, since it uses less digits than its factorization.

73812565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14762518.

The product of its digits is 50400, while the sum is 37.

The square root of 73812565 is about 8591.4239215627. The cubic root of 73812565 is about 419.4788793792.

The spelling of 73812565 in words is "seventy-three million, eight hundred twelve thousand, five hundred sixty-five".