61550085 has 16 divisors (see below), whose sum is σ = 99728640. Its totient is φ = 32410560.

The previous prime is 61550077. The next prime is 61550087. The reversal of 61550085 is 58005516.

It is a happy number.

61550085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61550085 - 2³ = 61550077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61550087) 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 in 15 ways as a sum of consecutive naturals, for example, 24786 + ... + 27155.

It is an arithmetic number, because the mean of its divisors is an integer number (6233040).

Almost surely, 2^61550085 is an apocalyptic number.

It is an amenable number.

61550085 is a deficient number, since it is larger than the sum of its proper divisors (38178555).

61550085 is a wasteful number, since it uses less digits than its factorization.

61550085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52028.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 61550085 is about 7845.3862237623. The cubic root of 61550085 is about 394.8294622474.

The spelling of 61550085 in words is "sixty-one million, five hundred fifty thousand, eighty-five".