61091755 has 8 divisors (see below), whose sum is σ = 73959552. Its totient is φ = 48440448.

The previous prime is 61091747. The next prime is 61091791. The reversal of 61091755 is 55719016.

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

It is a cyclic number.

It is not a de Polignac number, because 61091755 - 2³ = 61091747 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 61091755.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53499 + ... + 54628.

It is an arithmetic number, because the mean of its divisors is an integer number (9244944).

Almost surely, 2^61091755 is an apocalyptic number.

61091755 is a deficient number, since it is larger than the sum of its proper divisors (12867797).

61091755 is a wasteful number, since it uses less digits than its factorization.

61091755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108245.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 61091755 is about 7816.1214806322. The cubic root of 61091755 is about 393.8469928186.

The spelling of 61091755 in words is "sixty-one million, ninety-one thousand, seven hundred fifty-five".