155605061 has 2 divisors, whose sum is σ = 155605062. Its totient is φ = 155605060.

The previous prime is 155605049. The next prime is 155605069. The reversal of 155605061 is 160506551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110460100 + 45144961 = 10510^2 + 6719^2 .

It is a cyclic number.

It is not a de Polignac number, because 155605061 - 2²² = 151410757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155605069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77802530 + 77802531.

It is an arithmetic number, because the mean of its divisors is an integer number (77802531).

Almost surely, 2^155605061 is an apocalyptic number.

It is an amenable number.

155605061 is a deficient number, since it is larger than the sum of its proper divisors (1).

155605061 is an equidigital number, since it uses as much as digits as its factorization.

155605061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 155605061 is about 12474.1757643541. The cubic root of 155605061 is about 537.8665951252.

The spelling of 155605061 in words is "one hundred fifty-five million, six hundred five thousand, sixty-one".