73650581 has 4 divisors (see below), whose sum is σ = 73685964. Its totient is φ = 73615200.

The previous prime is 73650571. The next prime is 73650583. The reversal of 73650581 is 18505637.

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 61858225 + 11792356 = 7865^2 + 3434^2 .

It is a cyclic number.

It is not a de Polignac number, because 73650581 - 2¹⁰ = 73649557 is a prime.

It is a super-2 number, since 2×73650581² = 10848816163275122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73650583) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 14360 + ... + 18801.

It is an arithmetic number, because the mean of its divisors is an integer number (18421491).

Almost surely, 2^73650581 is an apocalyptic number.

It is an amenable number.

73650581 is a deficient number, since it is larger than the sum of its proper divisors (35383).

73650581 is a wasteful number, since it uses less digits than its factorization.

73650581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35382.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 73650581 is about 8581.9916686047. The cubic root of 73650581 is about 419.1718014321.

The spelling of 73650581 in words is "seventy-three million, six hundred fifty thousand, five hundred eighty-one".