8258161391 has 2 divisors, whose sum is σ = 8258161392. Its totient is φ = 8258161390.

The previous prime is 8258161369. The next prime is 8258161469. The reversal of 8258161391 is 1931618528.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8258161391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8258161321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4129080695 + 4129080696.

It is an arithmetic number, because the mean of its divisors is an integer number (4129080696).

Almost surely, 2^8258161391 is an apocalyptic number.

8258161391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8258161391 is an equidigital number, since it uses as much as digits as its factorization.

8258161391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 8258161391 is about 90874.4264961271. The cubic root of 8258161391 is about 2021.2860965725.

The spelling of 8258161391 in words is "eight billion, two hundred fifty-eight million, one hundred sixty-one thousand, three hundred ninety-one".