2028881556842 has 12 divisors (see below), whose sum is σ = 3540191288130. Its totient is φ = 869520667176.

The previous prime is 2028881556769. The next prime is 2028881556893. The reversal of 2028881556842 is 2486551888202.

It can be written as a sum of positive squares in only one way, i.e., 1162733046601 + 866148510241 = 1078301^2 + 930671^2 .

It is a super-3 number, since 3×2028881556842³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10351436417 + ... + 10351436612.

Almost surely, 2^{2028881556842} is an apocalyptic number.

2028881556842 is a deficient number, since it is larger than the sum of its proper divisors (1511309731288).

2028881556842 is a wasteful number, since it uses less digits than its factorization.

2028881556842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20702873045 (or 20702873038 counting only the distinct ones).

The product of its (nonzero) digits is 19660800, while the sum is 59.

The spelling of 2028881556842 in words is "two trillion, twenty-eight billion, eight hundred eighty-one million, five hundred fifty-six thousand, eight hundred forty-two".