55091266722 has 16 divisors (see below), whose sum is σ = 122425037280. Its totient is φ = 18363755556.

The previous prime is 55091266663. The next prime is 55091266723. The reversal of 55091266722 is 22766219055.

55091266722 is a `hidden beast` number, since 5 + 509 + 12 + 66 + 72 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (55091266723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510104268 + ... + 510104375.

It is an arithmetic number, because the mean of its divisors is an integer number (7651564830).

Almost surely, 2^55091266722 is an apocalyptic number.

55091266722 is an abundant number, since it is smaller than the sum of its proper divisors (67333770558).

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

55091266722 is a wasteful number, since it uses less digits than its factorization.

55091266722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020208654 (or 1020208648 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 55091266722 in words is "fifty-five billion, ninety-one million, two hundred sixty-six thousand, seven hundred twenty-two".