8415216773 has 4 divisors (see below), whose sum is σ = 8439056268. Its totient is φ = 8391377280.

The previous prime is 8415216763. The next prime is 8415216791. The reversal of 8415216773 is 3776125148.

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 1358880769 + 7056336004 = 36863^2 + 84002^2 .

It is a cyclic number.

It is not a de Polignac number, because 8415216773 - 2⁴ = 8415216757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8415216703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11919218 + ... + 11919923.

It is an arithmetic number, because the mean of its divisors is an integer number (2109764067).

Almost surely, 2^8415216773 is an apocalyptic number.

It is an amenable number.

8415216773 is a deficient number, since it is larger than the sum of its proper divisors (23839495).

8415216773 is a wasteful number, since it uses less digits than its factorization.

8415216773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23839494.

The product of its digits is 282240, while the sum is 44.

The square root of 8415216773 is about 91734.4906401077. The cubic root of 8415216773 is about 2034.0194551273.

The spelling of 8415216773 in words is "eight billion, four hundred fifteen million, two hundred sixteen thousand, seven hundred seventy-three".