61648849 has 2 divisors, whose sum is σ = 61648850. Its totient is φ = 61648848.

The previous prime is 61648841. The next prime is 61648859. The reversal of 61648849 is 94884616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33558849 + 28090000 = 5793^2 + 5300^2 .

It is a cyclic number.

It is not a de Polignac number, because 61648849 - 2³ = 61648841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61648799 and 61648808.

It is not a weakly prime, because it can be changed into another prime (61648841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30824424 + 30824425.

It is an arithmetic number, because the mean of its divisors is an integer number (30824425).

Almost surely, 2^61648849 is an apocalyptic number.

It is an amenable number.

61648849 is a deficient number, since it is larger than the sum of its proper divisors (1).

61648849 is an equidigital number, since it uses as much as digits as its factorization.

61648849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 61648849 is about 7851.6781008903. The cubic root of 61648849 is about 395.0405320796.

The spelling of 61648849 in words is "sixty-one million, six hundred forty-eight thousand, eight hundred forty-nine".