8180905457 has 2 divisors, whose sum is σ = 8180905458. Its totient is φ = 8180905456.

The previous prime is 8180905451. The next prime is 8180905459. The reversal of 8180905457 is 7545090818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7673935201 + 506970256 = 87601^2 + 22516^2 .

It is a cyclic number.

It is not a de Polignac number, because 8180905457 - 2⁴ = 8180905441 is a prime.

Together with 8180905459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8180905451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4090452728 + 4090452729.

It is an arithmetic number, because the mean of its divisors is an integer number (4090452729).

Almost surely, 2^8180905457 is an apocalyptic number.

It is an amenable number.

8180905457 is a deficient number, since it is larger than the sum of its proper divisors (1).

8180905457 is an equidigital number, since it uses as much as digits as its factorization.

8180905457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 8180905457 is about 90448.3579563499. The cubic root of 8180905457 is about 2014.9632264899.

The spelling of 8180905457 in words is "eight billion, one hundred eighty million, nine hundred five thousand, four hundred fifty-seven".