61055505550 has 24 divisors (see below), whose sum is σ = 122298875496. Its totient is φ = 22543571040.

The previous prime is 61055505517. The next prime is 61055505551. The reversal of 61055505550 is 5550555016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61055505551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46965124 + ... + 46966423.

It is an arithmetic number, because the mean of its divisors is an integer number (5095786479).

Almost surely, 2^61055505550 is an apocalyptic number.

61055505550 is an abundant number, since it is smaller than the sum of its proper divisors (61243369946).

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

61055505550 is a wasteful number, since it uses less digits than its factorization.

61055505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93931572 (or 93931567 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 37.

The spelling of 61055505550 in words is "sixty-one billion, fifty-five million, five hundred five thousand, five hundred fifty".