73116581 has 8 divisors (see below), whose sum is σ = 75167424. Its totient is φ = 71094240.

The previous prime is 73116557. The next prime is 73116587. The reversal of 73116581 is 18561137.

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

It is a cyclic number.

It is not a de Polignac number, because 73116581 - 2¹⁰ = 73115557 is a prime.

It is a super-2 number, since 2×73116581² = 10692068834259122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73116587) 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, 1871 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (9395928).

Almost surely, 2^73116581 is an apocalyptic number.

73116581 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

73116581 is a deficient number, since it is larger than the sum of its proper divisors (2050843).

73116581 is a wasteful number, since it uses less digits than its factorization.

73116581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14251.

The product of its digits is 5040, while the sum is 32.

The square root of 73116581 is about 8550.8234106430. The cubic root of 73116581 is about 418.1562814660.

The spelling of 73116581 in words is "seventy-three million, one hundred sixteen thousand, five hundred eighty-one".