61188055 has 8 divisors (see below), whose sum is σ = 73468944. Its totient is φ = 48921600.

The previous prime is 61188041. The next prime is 61188067. The reversal of 61188055 is 55088116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61188055 - 2²⁵ = 27633623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61188055.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11415 + ... + 15895.

It is an arithmetic number, because the mean of its divisors is an integer number (9183618).

Almost surely, 2^61188055 is an apocalyptic number.

61188055 is a deficient number, since it is larger than the sum of its proper divisors (12280889).

61188055 is a wasteful number, since it uses less digits than its factorization.

61188055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 61188055 is about 7822.2793992544. The cubic root of 61188055 is about 394.0538268082.

The spelling of 61188055 in words is "sixty-one million, one hundred eighty-eight thousand, fifty-five".