8611542991 has 2 divisors, whose sum is σ = 8611542992. Its totient is φ = 8611542990.

The previous prime is 8611542959. The next prime is 8611543013. The reversal of 8611542991 is 1992451168.

It is a happy number.

8611542991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8611542991 - 2⁵ = 8611542959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8611542941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4305771495 + 4305771496.

It is an arithmetic number, because the mean of its divisors is an integer number (4305771496).

Almost surely, 2^8611542991 is an apocalyptic number.

8611542991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8611542991 is an equidigital number, since it uses as much as digits as its factorization.

8611542991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 46.

The square root of 8611542991 is about 92798.3997221935. The cubic root of 8611542991 is about 2049.7158433029.

The spelling of 8611542991 in words is "eight billion, six hundred eleven million, five hundred forty-two thousand, nine hundred ninety-one".