1611250061 has 2 divisors, whose sum is σ = 1611250062. Its totient is φ = 1611250060.

The previous prime is 1611250051. The next prime is 1611250111. The reversal of 1611250061 is 1600521161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 928420900 + 682829161 = 30470^2 + 26131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1611250061 is a prime.

It is a super-2 number, since 2×1611250061² = 5192253518145007442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1611250001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805625030 + 805625031.

It is an arithmetic number, because the mean of its divisors is an integer number (805625031).

Almost surely, 2^1611250061 is an apocalyptic number.

It is an amenable number.

1611250061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611250061 is an equidigital number, since it uses as much as digits as its factorization.

1611250061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1611250061 is about 40140.3794326860. The cubic root of 1611250061 is about 1172.3419768456.

The spelling of 1611250061 in words is "one billion, six hundred eleven million, two hundred fifty thousand, sixty-one".