8771157481 has 2 divisors, whose sum is σ = 8771157482. Its totient is φ = 8771157480.

The previous prime is 8771157457. The next prime is 8771157491. The reversal of 8771157481 is 1847511778.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5821690000 + 2949467481 = 76300^2 + 54309^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8771157481 is a prime.

It is a super-2 number, since 2×8771157481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8771157491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4385578740 + 4385578741.

It is an arithmetic number, because the mean of its divisors is an integer number (4385578741).

Almost surely, 2^8771157481 is an apocalyptic number.

It is an amenable number.

8771157481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8771157481 is an equidigital number, since it uses as much as digits as its factorization.

8771157481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 49.

The square root of 8771157481 is about 93654.4578810854. The cubic root of 8771157481 is about 2062.3021895187.

The spelling of 8771157481 in words is "eight billion, seven hundred seventy-one million, one hundred fifty-seven thousand, four hundred eighty-one".