55560091 has 8 divisors (see below), whose sum is σ = 57600000. Its totient is φ = 53535720.

The previous prime is 55560083. The next prime is 55560121. The reversal of 55560091 is 19006555.

It is a happy number.

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 55560091 - 2³ = 55560083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55560031) 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 7 ways as a sum of consecutive naturals, for example, 3660 + ... + 11158.

It is an arithmetic number, because the mean of its divisors is an integer number (7200000).

Almost surely, 2^55560091 is an apocalyptic number.

55560091 is a deficient number, since it is larger than the sum of its proper divisors (2039909).

55560091 is a wasteful number, since it uses less digits than its factorization.

55560091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7769.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 55560091 is about 7453.8641656526. The cubic root of 55560091 is about 381.5817974776.

The spelling of 55560091 in words is "fifty-five million, five hundred sixty thousand, ninety-one".