8771157491 has 2 divisors, whose sum is σ = 8771157492. Its totient is φ = 8771157490.

The previous prime is 8771157481. The next prime is 8771157509. The reversal of 8771157491 is 1947511778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8771157491 - 2⁶ = 8771157427 is a prime.

It is not a weakly prime, because it can be changed into another prime (8771157481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4385578745 + 4385578746.

It is an arithmetic number, because the mean of its divisors is an integer number (4385578746).

Almost surely, 2^8771157491 is an apocalyptic number.

8771157491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8771157491 is an equidigital number, since it uses as much as digits as its factorization.

8771157491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 50.

The square root of 8771157491 is about 93654.4579344731. The cubic root of 8771157491 is about 2062.3021903025.

The spelling of 8771157491 in words is "eight billion, seven hundred seventy-one million, one hundred fifty-seven thousand, four hundred ninety-one".