55110007221985 has 16 divisors (see below), whose sum is σ = 70025168334672. Its totient is φ = 41492791296000.

The previous prime is 55110007221977. The next prime is 55110007221989. The reversal of 55110007221985 is 58912270001155.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 120678422544 + 54989328799441 = 347388^2 + 7415479^2 .

It is not a de Polignac number, because 55110007221985 - 2³ = 55110007221977 is a prime.

It is a super-2 number, since 2×55110007221985² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55110007221989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12111066 + ... + 16028035.

It is an arithmetic number, because the mean of its divisors is an integer number (4376573020917).

Almost surely, 2^{55110007221985} is an apocalyptic number.

It is an amenable number.

55110007221985 is a deficient number, since it is larger than the sum of its proper divisors (14915161112687).

55110007221985 is a wasteful number, since it uses less digits than its factorization.

55110007221985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28162164.

The product of its (nonzero) digits is 252000, while the sum is 46.

The spelling of 55110007221985 in words is "fifty-five trillion, one hundred ten billion, seven million, two hundred twenty-one thousand, nine hundred eighty-five".