605606510981 has 2 divisors, whose sum is σ = 605606510982. Its totient is φ = 605606510980.

The previous prime is 605606510909. The next prime is 605606511047. The reversal of 605606510981 is 189015606506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 323316194881 + 282290316100 = 568609^2 + 531310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605606510981 is a prime.

It is a super-2 number, since 2×605606510981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605606510281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302803255490 + 302803255491.

It is an arithmetic number, because the mean of its divisors is an integer number (302803255491).

Almost surely, 2^605606510981 is an apocalyptic number.

It is an amenable number.

605606510981 is a deficient number, since it is larger than the sum of its proper divisors (1).

605606510981 is an equidigital number, since it uses as much as digits as its factorization.

605606510981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 605606510981 in words is "six hundred five billion, six hundred six million, five hundred ten thousand, nine hundred eighty-one".