61255055216 has 20 divisors (see below), whose sum is σ = 118691640600. Its totient is φ = 30624954432.

The previous prime is 61255055203. The next prime is 61255055219.

61255055216 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 61255055216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61255055219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43430 + ... + 352698.

It is an arithmetic number, because the mean of its divisors is an integer number (5934582030).

Almost surely, 2^61255055216 is an apocalyptic number.

It is an amenable number.

61255055216 is a deficient number, since it is larger than the sum of its proper divisors (57436585384).

61255055216 is a wasteful number, since it uses less digits than its factorization.

61255055216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321656 (or 321650 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 38.

It can be divided in two parts, 612550 and 55216, that added together give a palindrome (667766).

The spelling of 61255055216 in words is "sixty-one billion, two hundred fifty-five million, fifty-five thousand, two hundred sixteen".