6411251551 has 2 divisors, whose sum is σ = 6411251552. Its totient is φ = 6411251550.

The previous prime is 6411251543. The next prime is 6411251591. The reversal of 6411251551 is 1551521146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6411251551 - 2³ = 6411251543 is a prime.

It is a super-3 number, since 3×6411251551³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6411251521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205625775 + 3205625776.

It is an arithmetic number, because the mean of its divisors is an integer number (3205625776).

Almost surely, 2^6411251551 is an apocalyptic number.

6411251551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6411251551 is an equidigital number, since it uses as much as digits as its factorization.

6411251551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 31.

The square root of 6411251551 is about 80070.2913133204. The cubic root of 6411251551 is about 1857.7229188303.

Adding to 6411251551 its reverse (1551521146), we get a palindrome (7962772697).

The spelling of 6411251551 in words is "six billion, four hundred eleven million, two hundred fifty-one thousand, five hundred fifty-one".