55997785 has 8 divisors (see below), whose sum is σ = 68336640. Its totient is φ = 44038704.

The previous prime is 55997741. The next prime is 55997797. The reversal of 55997785 is 58779955.

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 55997785 - 2⁷ = 55997657 is a prime.

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, 94617 + ... + 95206.

It is an arithmetic number, because the mean of its divisors is an integer number (8542080).

Almost surely, 2^55997785 is an apocalyptic number.

It is an amenable number.

55997785 is a deficient number, since it is larger than the sum of its proper divisors (12338855).

55997785 is a wasteful number, since it uses less digits than its factorization.

55997785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189887.

The product of its digits is 3969000, while the sum is 55.

The square root of 55997785 is about 7483.1667761717. The cubic root of 55997785 is about 382.5811922706.

The spelling of 55997785 in words is "fifty-five million, nine hundred ninety-seven thousand, seven hundred eighty-five".