8417772481 has 2 divisors, whose sum is σ = 8417772482. Its totient is φ = 8417772480.

The previous prime is 8417772463. The next prime is 8417772491. The reversal of 8417772481 is 1842777148.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4571788225 + 3845984256 = 67615^2 + 62016^2 .

It is a cyclic number.

It is not a de Polignac number, because 8417772481 - 2⁵ = 8417772449 is a prime.

It is a super-2 number, since 2×8417772481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8417772421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4208886240 + 4208886241.

It is an arithmetic number, because the mean of its divisors is an integer number (4208886241).

Almost surely, 2^8417772481 is an apocalyptic number.

It is an amenable number.

8417772481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8417772481 is an equidigital number, since it uses as much as digits as its factorization.

8417772481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 702464, while the sum is 49.

The square root of 8417772481 is about 91748.4195013734. The cubic root of 8417772481 is about 2034.2253453923.

The spelling of 8417772481 in words is "eight billion, four hundred seventeen million, seven hundred seventy-two thousand, four hundred eighty-one".