2148861681864 has 48 divisors (see below), whose sum is σ = 6126140763600. Its totient is φ = 678587899104.

The previous prime is 2148861681803. The next prime is 2148861681929. The reversal of 2148861681864 is 4681861688412.

2148861681864 is a `hidden beast` number, since 2 + 1 + 4 + 8 + 8 + 616 + 8 + 1 + 8 + 6 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 785401294 + ... + 785404029.

It is an arithmetic number, because the mean of its divisors is an integer number (127627932575).

Almost surely, 2^{2148861681864} is an apocalyptic number.

2148861681864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2148861681864 is an abundant number, since it is smaller than the sum of its proper divisors (3977279081736).

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

2148861681864 is a wasteful number, since it uses less digits than its factorization.

2148861681864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570805354 (or 1570805347 counting only the distinct ones).

The product of its digits is 28311552, while the sum is 63.

The spelling of 2148861681864 in words is "two trillion, one hundred forty-eight billion, eight hundred sixty-one million, six hundred eighty-one thousand, eight hundred sixty-four".