6254156561 has 2 divisors, whose sum is σ = 6254156562. Its totient is φ = 6254156560.

The previous prime is 6254156549. The next prime is 6254156563. The reversal of 6254156561 is 1656514526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4725737536 + 1528419025 = 68744^2 + 39095^2 .

It is a cyclic number.

It is not a de Polignac number, because 6254156561 - 2¹⁴ = 6254140177 is a prime.

It is a super-2 number, since 2×6254156561² = 78228948578998693442, which contains 22 as substring.

Together with 6254156563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6254156563) 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, 3127078280 + 3127078281.

It is an arithmetic number, because the mean of its divisors is an integer number (3127078281).

Almost surely, 2^6254156561 is an apocalyptic number.

It is an amenable number.

6254156561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6254156561 is an equidigital number, since it uses as much as digits as its factorization.

6254156561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 41.

The square root of 6254156561 is about 79083.2255348756. The cubic root of 6254156561 is about 1842.4240028746.

The spelling of 6254156561 in words is "six billion, two hundred fifty-four million, one hundred fifty-six thousand, five hundred sixty-one".