55277722500 has 960 divisors, whose sum is σ = 223368499200. Its totient is φ = 10264320000.

The previous prime is 55277722499. The next prime is 55277722547. The reversal of 55277722500 is 522777255.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 277777401 + ... + 277777599.

It is an arithmetic number, because the mean of its divisors is an integer number (232675520).

Almost surely, 2^55277722500 is an apocalyptic number.

55277722500 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 55277722500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111684249600).

55277722500 is an abundant number, since it is smaller than the sum of its proper divisors (168090776700).

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

55277722500 is a wasteful number, since it uses less digits than its factorization.

55277722500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 343000, while the sum is 42.

It can be divided in two parts, 55277 and 722500, that added together give a palindrome (777777).

The spelling of 55277722500 in words is "fifty-five billion, two hundred seventy-seven million, seven hundred twenty-two thousand, five hundred".