8158196749 has 2 divisors, whose sum is σ = 8158196750. Its totient is φ = 8158196748.

The previous prime is 8158196731. The next prime is 8158196779. The reversal of 8158196749 is 9476918518.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8157341124 + 855625 = 90318^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 8158196749 - 2⁹ = 8158196237 is a prime.

It is a super-3 number, since 3×8158196749³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8158196693 and 8158196702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8158196719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079098374 + 4079098375.

It is an arithmetic number, because the mean of its divisors is an integer number (4079098375).

Almost surely, 2^8158196749 is an apocalyptic number.

It is an amenable number.

8158196749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158196749 is an equidigital number, since it uses as much as digits as its factorization.

8158196749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 58.

The square root of 8158196749 is about 90322.7366115531. The cubic root of 8158196749 is about 2013.0971080798.

The spelling of 8158196749 in words is "eight billion, one hundred fifty-eight million, one hundred ninety-six thousand, seven hundred forty-nine".