6400365551 has 2 divisors, whose sum is σ = 6400365552. Its totient is φ = 6400365550.

The previous prime is 6400365527. The next prime is 6400365583. The reversal of 6400365551 is 1555630046.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6400365551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6400361551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200182775 + 3200182776.

It is an arithmetic number, because the mean of its divisors is an integer number (3200182776).

Almost surely, 2^6400365551 is an apocalyptic number.

6400365551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400365551 is an equidigital number, since it uses as much as digits as its factorization.

6400365551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 6400365551 is about 80002.2846611270. The cubic root of 6400365551 is about 1856.6708814688.

Adding to 6400365551 its reverse (1555630046), we get a palindrome (7955995597).

The spelling of 6400365551 in words is "six billion, four hundred million, three hundred sixty-five thousand, five hundred fifty-one".