61355550 has 48 divisors (see below), whose sum is σ = 161119152. Its totient is φ = 15398400.

The previous prime is 61355537. The next prime is 61355597. The reversal of 61355550 is 5555316.

61355550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 9481 + ... + 14580.

It is an arithmetic number, because the mean of its divisors is an integer number (3356649).

Almost surely, 2^61355550 is an apocalyptic number.

61355550 is an abundant number, since it is smaller than the sum of its proper divisors (99763602).

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

61355550 is a wasteful number, since it uses less digits than its factorization.

61355550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24093 (or 24088 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 61355550 is about 7832.9783607514. The cubic root of 61355550 is about 394.4130576685.

The spelling of 61355550 in words is "sixty-one million, three hundred fifty-five thousand, five hundred fifty".