1611082961 has 2 divisors, whose sum is σ = 1611082962. Its totient is φ = 1611082960.

The previous prime is 1611082951. The next prime is 1611082981. The reversal of 1611082961 is 1692801161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1171761361 + 439321600 = 34231^2 + 20960^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611082961 - 2¹⁰ = 1611081937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1611082931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805541480 + 805541481.

It is an arithmetic number, because the mean of its divisors is an integer number (805541481).

Almost surely, 2^1611082961 is an apocalyptic number.

It is an amenable number.

1611082961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611082961 is an equidigital number, since it uses as much as digits as its factorization.

1611082961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1611082961 is about 40138.2979335198. The cubic root of 1611082961 is about 1172.3014482478.

The spelling of 1611082961 in words is "one billion, six hundred eleven million, eighty-two thousand, nine hundred sixty-one".