55255052780500 has 96 divisors (see below), whose sum is σ = 121879338287616. Its totient is φ = 21881846000000.

The previous prime is 55255052780489. The next prime is 55255052780507. The reversal of 55255052780500 is 508725055255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55255052780507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1403425815 + ... + 1403465185.

It is an arithmetic number, because the mean of its divisors is an integer number (1269576440496).

Almost surely, 2^{55255052780500} is an apocalyptic number.

55255052780500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55255052780500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60939669143808).

55255052780500 is an abundant number, since it is smaller than the sum of its proper divisors (66624285507116).

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

55255052780500 is a wasteful number, since it uses less digits than its factorization.

55255052780500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67282 (or 67270 counting only the distinct ones).

The product of its (nonzero) digits is 3500000, while the sum is 49.

The spelling of 55255052780500 in words is "fifty-five trillion, two hundred fifty-five billion, fifty-two million, seven hundred eighty thousand, five hundred".