2148861681874 has 16 divisors (see below), whose sum is σ = 3257283009816. Its totient is φ = 1063157472000.

The previous prime is 2148861681803. The next prime is 2148861681929. The reversal of 2148861681874 is 4781861688412.

It can be written as a sum of positive squares in 4 ways, for example, as 1548867366225 + 599994315649 = 1244535^2 + 774593^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14122477 + ... + 14273824.

Almost surely, 2^{2148861681874} is an apocalyptic number.

2148861681874 is a deficient number, since it is larger than the sum of its proper divisors (1108421327942).

2148861681874 is a wasteful number, since it uses less digits than its factorization.

2148861681874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28396701.

The product of its digits is 33030144, while the sum is 64.

The spelling of 2148861681874 in words is "two trillion, one hundred forty-eight billion, eight hundred sixty-one million, six hundred eighty-one thousand, eight hundred seventy-four".