61028559 has 10 divisors (see below), whose sum is σ = 91166240. Its totient is φ = 40685652.

The previous prime is 61028549. The next prime is 61028573. The reversal of 61028559 is 95582016.

It is a happy number.

It is not a de Polignac number, because 61028559 - 2⁹ = 61028047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61028549) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 376639 + ... + 376800.

It is an arithmetic number, because the mean of its divisors is an integer number (9116624).

Almost surely, 2^61028559 is an apocalyptic number.

61028559 is a deficient number, since it is larger than the sum of its proper divisors (30137681).

61028559 is an equidigital number, since it uses as much as digits as its factorization.

61028559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753451 (or 753442 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 61028559 is about 7812.0777645899. The cubic root of 61028559 is about 393.7111417435.

The spelling of 61028559 in words is "sixty-one million, twenty-eight thousand, five hundred fifty-nine".