8134493561 has 2 divisors, whose sum is σ = 8134493562. Its totient is φ = 8134493560.

The previous prime is 8134493453. The next prime is 8134493593. The reversal of 8134493561 is 1653944318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6629053561 + 1505440000 = 81419^2 + 38800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8134493561 is a prime.

It is not a weakly prime, because it can be changed into another prime (8134496561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4067246780 + 4067246781.

It is an arithmetic number, because the mean of its divisors is an integer number (4067246781).

Almost surely, 2^8134493561 is an apocalyptic number.

It is an amenable number.

8134493561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8134493561 is an equidigital number, since it uses as much as digits as its factorization.

8134493561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 8134493561 is about 90191.4273143518. The cubic root of 8134493561 is about 2011.1455695115.

The spelling of 8134493561 in words is "eight billion, one hundred thirty-four million, four hundred ninety-three thousand, five hundred sixty-one".