55255702866 has 128 divisors (see below), whose sum is σ = 138840791040. Its totient is φ = 14273183232.

The previous prime is 55255702819. The next prime is 55255702889. The reversal of 55255702866 is 66820755255.

It is a happy number.

It is a super-2 number, since 2×55255702866² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5194245 + ... + 5204871.

It is an arithmetic number, because the mean of its divisors is an integer number (1084693680).

Almost surely, 2^55255702866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55255702866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69420395520).

55255702866 is an abundant number, since it is smaller than the sum of its proper divisors (83585088174).

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

55255702866 is a wasteful number, since it uses less digits than its factorization.

55255702866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10848.

The product of its (nonzero) digits is 5040000, while the sum is 51.

The spelling of 55255702866 in words is "fifty-five billion, two hundred fifty-five million, seven hundred two thousand, eight hundred sixty-six".