55544763440 has 80 divisors (see below), whose sum is σ = 131189103360. Its totient is φ = 21866254080.

The previous prime is 55544763431. The next prime is 55544763487. The reversal of 55544763440 is 4436744555.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 6744125 + ... + 6752355.

It is an arithmetic number, because the mean of its divisors is an integer number (1639863792).

Almost surely, 2^55544763440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55544763440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65594551680).

55544763440 is an abundant number, since it is smaller than the sum of its proper divisors (75644339920).

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

55544763440 is a wasteful number, since it uses less digits than its factorization.

55544763440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570 (or 9564 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 47.

The spelling of 55544763440 in words is "fifty-five billion, five hundred forty-four million, seven hundred sixty-three thousand, four hundred forty".