61804649 has 2 divisors, whose sum is σ = 61804650. Its totient is φ = 61804648.

The previous prime is 61804637. The next prime is 61804679. The reversal of 61804649 is 94640816.

61804649 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., 31719424 + 30085225 = 5632^2 + 5485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61804649 is a prime.

It is not a weakly prime, because it can be changed into another prime (61804679) 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, 30902324 + 30902325.

It is an arithmetic number, because the mean of its divisors is an integer number (30902325).

Almost surely, 2^61804649 is an apocalyptic number.

It is an amenable number.

61804649 is a deficient number, since it is larger than the sum of its proper divisors (1).

61804649 is an equidigital number, since it uses as much as digits as its factorization.

61804649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 61804649 is about 7861.5932863511. The cubic root of 61804649 is about 395.3730364749.

The spelling of 61804649 in words is "sixty-one million, eight hundred four thousand, six hundred forty-nine".