611162115661 has 2 divisors, whose sum is σ = 611162115662. Its totient is φ = 611162115660.

The previous prime is 611162115659. The next prime is 611162115691. The reversal of 611162115661 is 166511261116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314906157225 + 296255958436 = 561165^2 + 544294^2 .

It is a cyclic number.

It is not a de Polignac number, because 611162115661 - 2¹ = 611162115659 is a prime.

Together with 611162115659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 611162115661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611162115691) 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, 305581057830 + 305581057831.

It is an arithmetic number, because the mean of its divisors is an integer number (305581057831).

Almost surely, 2^611162115661 is an apocalyptic number.

It is an amenable number.

611162115661 is a deficient number, since it is larger than the sum of its proper divisors (1).

611162115661 is an equidigital number, since it uses as much as digits as its factorization.

611162115661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 37.

Adding to 611162115661 its reverse (166511261116), we get a palindrome (777673376777).

The spelling of 611162115661 in words is "six hundred eleven billion, one hundred sixty-two million, one hundred fifteen thousand, six hundred sixty-one".