55144420266 has 32 divisors (see below), whose sum is σ = 119997073728. Its totient is φ = 16792588800.

The previous prime is 55144420249. The next prime is 55144420291. The reversal of 55144420266 is 66202444155.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3636660 + ... + 3651791.

It is an arithmetic number, because the mean of its divisors is an integer number (3749908554).

Almost surely, 2^55144420266 is an apocalyptic number.

55144420266 is an abundant number, since it is smaller than the sum of its proper divisors (64852653462).

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

55144420266 is a wasteful number, since it uses less digits than its factorization.

55144420266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288566.

The product of its (nonzero) digits is 230400, while the sum is 39.

The spelling of 55144420266 in words is "fifty-five billion, one hundred forty-four million, four hundred twenty thousand, two hundred sixty-six".