55509244816 has 15 divisors (see below), whose sum is σ = 107550987793. Its totient is φ = 27754151200.

The previous prime is 55509244799. The next prime is 55509244859. The reversal of 55509244816 is 61844290555.

It is a happy number.

The square root of 55509244816 is 235604.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2829814416 + 52679430400 = 53196^2 + 229520^2 .

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 55509244816.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 912966 + ... + 971866.

Almost surely, 2^55509244816 is an apocalyptic number.

55509244816 is the 235604-th square number.

It is an amenable number.

55509244816 is a deficient number, since it is larger than the sum of its proper divisors (52041742977).

55509244816 is an frugal number, since it uses more digits than its factorization.

55509244816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117810 (or 58903 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 49.

Multiplying 55509244816 by its sum of digits (49), we get a square (2719952995984 = 1649228²).

The spelling of 55509244816 in words is "fifty-five billion, five hundred nine million, two hundred forty-four thousand, eight hundred sixteen".