6551054561 has 2 divisors, whose sum is σ = 6551054562. Its totient is φ = 6551054560.

The previous prime is 6551054537. The next prime is 6551054581. The reversal of 6551054561 is 1654501556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4713646336 + 1837408225 = 68656^2 + 42865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6551054561 is a prime.

It is a super-2 number, since 2×6551054561² = 85832631722397805442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6551054581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275527280 + 3275527281.

It is an arithmetic number, because the mean of its divisors is an integer number (3275527281).

Almost surely, 2^6551054561 is an apocalyptic number.

It is an amenable number.

6551054561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6551054561 is an equidigital number, since it uses as much as digits as its factorization.

6551054561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90000, while the sum is 38.

The square root of 6551054561 is about 80938.5851185947. The cubic root of 6551054561 is about 1871.1290388946.

The spelling of 6551054561 in words is "six billion, five hundred fifty-one million, fifty-four thousand, five hundred sixty-one".