61005605605111 has 2 divisors, whose sum is σ = 61005605605112. Its totient is φ = 61005605605110.

The previous prime is 61005605605099. The next prime is 61005605605121. The reversal of 61005605605111 is 11150650650016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61005605605111 - 2³⁷ = 60868166651639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61005605605121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502802802555 + 30502802802556.

It is an arithmetic number, because the mean of its divisors is an integer number (30502802802556).

Almost surely, 2^{61005605605111} is an apocalyptic number.

61005605605111 is a deficient number, since it is larger than the sum of its proper divisors (1).

61005605605111 is an equidigital number, since it uses as much as digits as its factorization.

61005605605111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 61005605605111 in words is "sixty-one trillion, five billion, six hundred five million, six hundred five thousand, one hundred eleven".