611260266289 has 2 divisors, whose sum is σ = 611260266290. Its totient is φ = 611260266288.

The previous prime is 611260266257. The next prime is 611260266313. The reversal of 611260266289 is 982662062116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 515225355264 + 96034911025 = 717792^2 + 309895^2 .

It is a cyclic number.

It is not a de Polignac number, because 611260266289 - 2⁵ = 611260266257 is a prime.

It is a super-2 number, since 2×611260266289² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (611260266209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305630133144 + 305630133145.

It is an arithmetic number, because the mean of its divisors is an integer number (305630133145).

Almost surely, 2^611260266289 is an apocalyptic number.

It is an amenable number.

611260266289 is a deficient number, since it is larger than the sum of its proper divisors (1).

611260266289 is an equidigital number, since it uses as much as digits as its factorization.

611260266289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 611260266289 in words is "six hundred eleven billion, two hundred sixty million, two hundred sixty-six thousand, two hundred eighty-nine".