55049571818 has 4 divisors (see below), whose sum is σ = 82574357730. Its totient is φ = 27524785908.

The previous prime is 55049571793. The next prime is 55049571827. The reversal of 55049571818 is 81817594055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 48398680009 + 6650891809 = 219997^2 + 81553^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55049571818.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13762392953 + ... + 13762392956.

Almost surely, 2^55049571818 is an apocalyptic number.

55049571818 is a deficient number, since it is larger than the sum of its proper divisors (27524785912).

55049571818 is a wasteful number, since it uses less digits than its factorization.

55049571818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27524785911.

The product of its (nonzero) digits is 2016000, while the sum is 53.

The spelling of 55049571818 in words is "fifty-five billion, forty-nine million, five hundred seventy-one thousand, eight hundred eighteen".