61980851 has 2 divisors, whose sum is σ = 61980852. Its totient is φ = 61980850.

The previous prime is 61980833. The next prime is 61980887. The reversal of 61980851 is 15808916.

61980851 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 is a cyclic number.

It is not a de Polignac number, because 61980851 - 2¹⁴ = 61964467 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61980251) 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, 30990425 + 30990426.

It is an arithmetic number, because the mean of its divisors is an integer number (30990426).

Almost surely, 2^61980851 is an apocalyptic number.

61980851 is a deficient number, since it is larger than the sum of its proper divisors (1).

61980851 is an equidigital number, since it uses as much as digits as its factorization.

61980851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 61980851 is about 7872.7918173924. The cubic root of 61980851 is about 395.7484096398.

The spelling of 61980851 in words is "sixty-one million, nine hundred eighty thousand, eight hundred fifty-one".