6591551951 has 2 divisors, whose sum is σ = 6591551952. Its totient is φ = 6591551950.

The previous prime is 6591551929. The next prime is 6591551963. The reversal of 6591551951 is 1591551956.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6591551951 - 2²⁶ = 6524443087 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 6591551896 and 6591551905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6591551651) 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, 3295775975 + 3295775976.

It is an arithmetic number, because the mean of its divisors is an integer number (3295775976).

Almost surely, 2^6591551951 is an apocalyptic number.

6591551951 is a deficient number, since it is larger than the sum of its proper divisors (1).

6591551951 is an equidigital number, since it uses as much as digits as its factorization.

6591551951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 303750, while the sum is 47.

The square root of 6591551951 is about 81188.3732501151. The cubic root of 6591551951 is about 1874.9767772887.

The spelling of 6591551951 in words is "six billion, five hundred ninety-one million, five hundred fifty-one thousand, nine hundred fifty-one".