61105550 has 48 divisors (see below), whose sum is σ = 124773264. Its totient is φ = 22080000.

The previous prime is 61105547. The next prime is 61105571. The reversal of 61105550 is 5550116.

61105550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 132320 + ... + 132780.

It is an arithmetic number, because the mean of its divisors is an integer number (2599443).

Almost surely, 2^61105550 is an apocalyptic number.

61105550 is an abundant number, since it is smaller than the sum of its proper divisors (63667714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61105550 is a wasteful number, since it uses less digits than its factorization.

61105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 61105550 is about 7817.0039017516. The cubic root of 61105550 is about 393.8766351730.

Adding to 61105550 its reverse (5550116), we get a palindrome (66655666).

The spelling of 61105550 in words is "sixty-one million, one hundred five thousand, five hundred fifty".