2148031278017 has 4 divisors (see below), whose sum is σ = 2148098075220. Its totient is φ = 2147964480816.

The previous prime is 2148031277989. The next prime is 2148031278031. The reversal of 2148031278017 is 7108721308412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1725967965121 + 422063312896 = 1313761^2 + 649664^2 .

It is a cyclic number.

It is not a de Polignac number, because 2148031278017 - 2⁸ = 2148031277761 is a prime.

It is a super-2 number, since 2×2148031278017² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148031278817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33350342 + ... + 33414687.

It is an arithmetic number, because the mean of its divisors is an integer number (537024518805).

Almost surely, 2^{2148031278017} is an apocalyptic number.

It is an amenable number.

2148031278017 is a deficient number, since it is larger than the sum of its proper divisors (66797203).

2148031278017 is an equidigital number, since it uses as much as digits as its factorization.

2148031278017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66797202.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 2148031278017 in words is "two trillion, one hundred forty-eight billion, thirty-one million, two hundred seventy-eight thousand, seventeen".