2148621706881 has 24 divisors (see below), whose sum is σ = 3342349843560. Its totient is φ = 1322209195776.

The previous prime is 2148621706849. The next prime is 2148621706919. The reversal of 2148621706881 is 1886071268412.

2148621706881 is a `hidden beast` number, since 2 + 1 + 4 + 8 + 621 + 7 + 0 + 6 + 8 + 8 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 205608740481 + 1943012966400 = 453441^2 + 1393920^2 .

It is not a de Polignac number, because 2148621706881 - 2⁵ = 2148621706849 is a prime.

It is a super-2 number, since 2×2148621706881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2148621706801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14889805 + ... + 15033413.

It is an arithmetic number, because the mean of its divisors is an integer number (139264576815).

Almost surely, 2^{2148621706881} is an apocalyptic number.

It is an amenable number.

2148621706881 is a deficient number, since it is larger than the sum of its proper divisors (1193728136679).

2148621706881 is a wasteful number, since it uses less digits than its factorization.

2148621706881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271505 (or 271502 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 2148621706881 in words is "two trillion, one hundred forty-eight billion, six hundred twenty-one million, seven hundred six thousand, eight hundred eighty-one".