5456261561 has 2 divisors, whose sum is σ = 5456261562. Its totient is φ = 5456261560.

The previous prime is 5456261507. The next prime is 5456261567. The reversal of 5456261561 is 1651626545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5353117225 + 103144336 = 73165^2 + 10156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5456261561 is a prime.

It is not a weakly prime, because it can be changed into another prime (5456261567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728130780 + 2728130781.

It is an arithmetic number, because the mean of its divisors is an integer number (2728130781).

Almost surely, 2^5456261561 is an apocalyptic number.

It is an amenable number.

5456261561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5456261561 is an equidigital number, since it uses as much as digits as its factorization.

5456261561 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 5456261561 is about 73866.5117695428. The cubic root of 5456261561 is about 1760.4825597631.

The spelling of 5456261561 in words is "five billion, four hundred fifty-six million, two hundred sixty-one thousand, five hundred sixty-one".