55444694420 has 24 divisors (see below), whose sum is σ = 119273710248. Its totient is φ = 21636953600.

The previous prime is 55444694381. The next prime is 55444694429. The reversal of 55444694420 is 2449644455.

It can be written as a sum of positive squares in 4 ways, for example, as 1471182736 + 53973511684 = 38356^2 + 232322^2 .

It is a super-2 number, since 2×55444694420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55444694429) 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, 33806921 + ... + 33808560.

It is an arithmetic number, because the mean of its divisors is an integer number (4969737927).

Almost surely, 2^55444694420 is an apocalyptic number.

It is an amenable number.

55444694420 is an abundant number, since it is smaller than the sum of its proper divisors (63829015828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55444694420 is a wasteful number, since it uses less digits than its factorization.

55444694420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67615531 (or 67615529 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 47.

It can be divided in two parts, 5544 and 4694420, that added together give a palindrome (4699964).

The spelling of 55444694420 in words is "fifty-five billion, four hundred forty-four million, six hundred ninety-four thousand, four hundred twenty".