55320515105240 has 128 divisors (see below), whose sum is σ = 155219756544000. Its totient is φ = 17238876295680.

The previous prime is 55320515105227. The next prime is 55320515105279. The reversal of 55320515105240 is 4250151502355.

It is a junction number, because it is equal to n+sod(n) for n = 55320515105194 and 55320515105203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11677286 + ... + 15716234.

It is an arithmetic number, because the mean of its divisors is an integer number (1212654348000).

Almost surely, 2^{55320515105240} 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 55320515105240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77609878272000).

55320515105240 is an abundant number, since it is smaller than the sum of its proper divisors (99899241438760).

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

55320515105240 is a wasteful number, since it uses less digits than its factorization.

55320515105240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043425 (or 4043421 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 38.

Adding to 55320515105240 its reverse (4250151502355), we get a palindrome (59570666607595).

The spelling of 55320515105240 in words is "fifty-five trillion, three hundred twenty billion, five hundred fifteen million, one hundred five thousand, two hundred forty".