61556113 has 2 divisors, whose sum is σ = 61556114. Its totient is φ = 61556112.

The previous prime is 61556107. The next prime is 61556153. The reversal of 61556113 is 31165516.

61556113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49674304 + 11881809 = 7048^2 + 3447^2 .

It is a cyclic number.

It is not a de Polignac number, because 61556113 - 2⁵ = 61556081 is a prime.

It is not a weakly prime, because it can be changed into another prime (61556153) 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, 30778056 + 30778057.

It is an arithmetic number, because the mean of its divisors is an integer number (30778057).

Almost surely, 2^61556113 is an apocalyptic number.

It is an amenable number.

61556113 is a deficient number, since it is larger than the sum of its proper divisors (1).

61556113 is an equidigital number, since it uses as much as digits as its factorization.

61556113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 61556113 is about 7845.7703891970. The cubic root of 61556113 is about 394.8423512321.

The spelling of 61556113 in words is "sixty-one million, five hundred fifty-six thousand, one hundred thirteen".