55502444240 has 80 divisors (see below), whose sum is σ = 130998282240. Its totient is φ = 21867148800.

The previous prime is 55502444219. The next prime is 55502444267. The reversal of 55502444240 is 4244420555.

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

It is a super-2 number, since 2×55502444240² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55502444240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1392590 + ... + 1431890.

It is an arithmetic number, because the mean of its divisors is an integer number (1637478528).

Almost surely, 2^55502444240 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 55502444240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65499141120).

55502444240 is an abundant number, since it is smaller than the sum of its proper divisors (75495838000).

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

55502444240 is a wasteful number, since it uses less digits than its factorization.

55502444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39580 (or 39574 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 35.

Adding to 55502444240 its reverse (4244420555), we get a palindrome (59746864795).

The spelling of 55502444240 in words is "fifty-five billion, five hundred two million, four hundred forty-four thousand, two hundred forty".