61718055 has 64 divisors (see below), whose sum is σ = 118652928. Its totient is φ = 26801280.

The previous prime is 61718051. The next prime is 61718057. The reversal of 61718055 is 55081716.

It is not a de Polignac number, because 61718055 - 2² = 61718051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61718051) 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 63 ways as a sum of consecutive naturals, for example, 217944 + ... + 218226.

It is an arithmetic number, because the mean of its divisors is an integer number (1853952).

Almost surely, 2^61718055 is an apocalyptic number.

61718055 is a deficient number, since it is larger than the sum of its proper divisors (56934873).

61718055 is a wasteful number, since it uses less digits than its factorization.

61718055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 61718055 is about 7856.0839481258. The cubic root of 61718055 is about 395.1882988355.

The spelling of 61718055 in words is "sixty-one million, seven hundred eighteen thousand, fifty-five".