55420440424 has 16 divisors (see below), whose sum is σ = 104035159620. Its totient is φ = 27677731200.

The previous prime is 55420440391. The next prime is 55420440431. The reversal of 55420440424 is 42404402455.

It can be written as a sum of positive squares in 2 ways, for example, as 41527103524 + 13893336900 = 203782^2 + 117870^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55420440424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4053877 + ... + 4067524.

Almost surely, 2^55420440424 is an apocalyptic number.

It is an amenable number.

55420440424 is a deficient number, since it is larger than the sum of its proper divisors (48614719196).

55420440424 is a wasteful number, since it uses less digits than its factorization.

55420440424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8122260 (or 8122256 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 34.

Adding to 55420440424 its reverse (42404402455), we get a palindrome (97824842879).

The spelling of 55420440424 in words is "fifty-five billion, four hundred twenty million, four hundred forty thousand, four hundred twenty-four".