8216720410 has 8 divisors (see below), whose sum is σ = 14790096756. Its totient is φ = 3286688160.

The previous prime is 8216720383. The next prime is 8216720419. The reversal of 8216720410 is 140276128.

It can be written as a sum of positive squares in 2 ways, for example, as 7963242169 + 253478241 = 89237^2 + 15921^2 .

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

It is a super-2 number, since 2×8216720410² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8216720419) 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, 410836011 + ... + 410836030.

Almost surely, 2^8216720410 is an apocalyptic number.

8216720410 is a deficient number, since it is larger than the sum of its proper divisors (6573376346).

8216720410 is a wasteful number, since it uses less digits than its factorization.

8216720410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821672048.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8216720410 is about 90646.1273855646. The cubic root of 8216720410 is about 2017.8993626806.

Adding to 8216720410 its reverse (140276128), we get a palindrome (8356996538).

The spelling of 8216720410 in words is "eight billion, two hundred sixteen million, seven hundred twenty thousand, four hundred ten".