55277505280 has 72 divisors (see below), whose sum is σ = 133373796192. Its totient is φ = 21949538304.

The previous prime is 55277505247. The next prime is 55277505299. The reversal of 55277505280 is 8250577255.

55277505280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55277505280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17749 + ... + 332971.

It is an arithmetic number, because the mean of its divisors is an integer number (1852413836).

Almost surely, 2^55277505280 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 55277505280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66686898096).

55277505280 is an abundant number, since it is smaller than the sum of its proper divisors (78096290912).

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

55277505280 is a wasteful number, since it uses less digits than its factorization.

55277505280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315381 (or 315367 counting only the distinct ones).

The product of its (nonzero) digits is 980000, while the sum is 46.

The spelling of 55277505280 in words is "fifty-five billion, two hundred seventy-seven million, five hundred five thousand, two hundred eighty".