606161581 has 2 divisors, whose sum is σ = 606161582. Its totient is φ = 606161580.

The previous prime is 606161557. The next prime is 606161587. The reversal of 606161581 is 185161606.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603488356 + 2673225 = 24566^2 + 1635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-606161581 is a prime.

It is a super-2 number, since 2×606161581² = 734863724560839122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606161587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303080790 + 303080791.

It is an arithmetic number, because the mean of its divisors is an integer number (303080791).

Almost surely, 2^606161581 is an apocalyptic number.

It is an amenable number.

606161581 is a deficient number, since it is larger than the sum of its proper divisors (1).

606161581 is an equidigital number, since it uses as much as digits as its factorization.

606161581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 606161581 is about 24620.3489211668. The cubic root of 606161581 is about 846.3099931068.

The spelling of 606161581 in words is "six hundred six million, one hundred sixty-one thousand, five hundred eighty-one".