61555049 has 2 divisors, whose sum is σ = 61555050. Its totient is φ = 61555048.

The previous prime is 61555027. The next prime is 61555051. The reversal of 61555049 is 94055516.

61555049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55771024 + 5784025 = 7468^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 61555049 - 2⁸ = 61554793 is a prime.

Together with 61555051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61555009) 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, 30777524 + 30777525.

It is an arithmetic number, because the mean of its divisors is an integer number (30777525).

Almost surely, 2^61555049 is an apocalyptic number.

It is an amenable number.

61555049 is a deficient number, since it is larger than the sum of its proper divisors (1).

61555049 is an equidigital number, since it uses as much as digits as its factorization.

61555049 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 35.

The square root of 61555049 is about 7845.7025816685. The cubic root of 61555049 is about 394.8400762634.

The spelling of 61555049 in words is "sixty-one million, five hundred fifty-five thousand, forty-nine".