1611838061 has 2 divisors, whose sum is σ = 1611838062. Its totient is φ = 1611838060.

The previous prime is 1611838057. The next prime is 1611838079. The reversal of 1611838061 is 1608381161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1153621225 + 458216836 = 33965^2 + 21406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611838061 - 2² = 1611838057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1611838021) 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, 805919030 + 805919031.

It is an arithmetic number, because the mean of its divisors is an integer number (805919031).

Almost surely, 2^1611838061 is an apocalyptic number.

It is an amenable number.

1611838061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611838061 is an equidigital number, since it uses as much as digits as its factorization.

1611838061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1611838061 is about 40147.7030600756. The cubic root of 1611838061 is about 1172.4845686675.

The spelling of 1611838061 in words is "one billion, six hundred eleven million, eight hundred thirty-eight thousand, sixty-one".