6556150561 has 2 divisors, whose sum is σ = 6556150562. Its totient is φ = 6556150560.

The previous prime is 6556150547. The next prime is 6556150603. The reversal of 6556150561 is 1650516556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6079164961 + 476985600 = 77969^2 + 21840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6556150561 - 2⁹ = 6556150049 is a prime.

It is a super-2 number, since 2×6556150561² = 85966220357001229442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6556150511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278075280 + 3278075281.

It is an arithmetic number, because the mean of its divisors is an integer number (3278075281).

Almost surely, 2^6556150561 is an apocalyptic number.

It is an amenable number.

6556150561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556150561 is an equidigital number, since it uses as much as digits as its factorization.

6556150561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 6556150561 is about 80970.0596578760. The cubic root of 6556150561 is about 1871.6140906827.

The spelling of 6556150561 in words is "six billion, five hundred fifty-six million, one hundred fifty thousand, five hundred sixty-one".