7591541861 has 2 divisors, whose sum is σ = 7591541862. Its totient is φ = 7591541860.

The previous prime is 7591541833. The next prime is 7591541869. The reversal of 7591541861 is 1681451957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7546396900 + 45144961 = 86870^2 + 6719^2 .

It is a cyclic number.

It is not a de Polignac number, because 7591541861 - 2²⁶ = 7524432997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7591541869) 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, 3795770930 + 3795770931.

It is an arithmetic number, because the mean of its divisors is an integer number (3795770931).

Almost surely, 2^7591541861 is an apocalyptic number.

It is an amenable number.

7591541861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7591541861 is an equidigital number, since it uses as much as digits as its factorization.

7591541861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 47.

The square root of 7591541861 is about 87129.4546120886. The cubic root of 7591541861 is about 1965.3655099434.

The spelling of 7591541861 in words is "seven billion, five hundred ninety-one million, five hundred forty-one thousand, eight hundred sixty-one".