61646201 has 2 divisors, whose sum is σ = 61646202. Its totient is φ = 61646200.

The previous prime is 61646191. The next prime is 61646239. The reversal of 61646201 is 10264616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59274601 + 2371600 = 7699^2 + 1540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61646201 is a prime.

It is not a weakly prime, because it can be changed into another prime (61646251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30823100 + 30823101.

It is an arithmetic number, because the mean of its divisors is an integer number (30823101).

Almost surely, 2^61646201 is an apocalyptic number.

It is an amenable number.

61646201 is a deficient number, since it is larger than the sum of its proper divisors (1).

61646201 is an equidigital number, since it uses as much as digits as its factorization.

61646201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 61646201 is about 7851.5094727065. The cubic root of 61646201 is about 395.0348759464.

The spelling of 61646201 in words is "sixty-one million, six hundred forty-six thousand, two hundred one".