55155227339520 has 5184 divisors, whose sum is σ = 272523583180800. Its totient is φ = 10484387020800.

The previous prime is 55155227339491. The next prime is 55155227339521. The reversal of 55155227339520 is 2593372255155.

55155227339520 is a `hidden beast` number, since 5 + 5 + 1 + 5 + 5 + 227 + 3 + 395 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (55155227339521) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 120689775132 + ... + 120689775588.

Almost surely, 2^{55155227339520} 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 55155227339520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136261791590400).

55155227339520 is an abundant number, since it is smaller than the sum of its proper divisors (217368355841280).

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

55155227339520 is a wasteful number, since it uses less digits than its factorization.

55155227339520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 14175000, while the sum is 54.

The spelling of 55155227339520 in words is "fifty-five trillion, one hundred fifty-five billion, two hundred twenty-seven million, three hundred thirty-nine thousand, five hundred twenty".