55555784899 has 8 divisors (see below), whose sum is σ = 58869149328. Its totient is φ = 52247462400.

The previous prime is 55555784897. The next prime is 55555784917. The reversal of 55555784899 is 99848755555.

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 55555784899 - 2¹ = 55555784897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55555784897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237777 + ... + 1281874.

It is an arithmetic number, because the mean of its divisors is an integer number (7358643666).

Almost surely, 2^55555784899 is an apocalyptic number.

55555784899 is a deficient number, since it is larger than the sum of its proper divisors (3313364429).

55555784899 is a wasteful number, since it uses less digits than its factorization.

55555784899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520965.

The product of its digits is 453600000, while the sum is 70.

The spelling of 55555784899 in words is "fifty-five billion, five hundred fifty-five million, seven hundred eighty-four thousand, eight hundred ninety-nine".