1889648469881 has 4 divisors (see below), whose sum is σ = 1893528652032. Its totient is φ = 1885768287732.

The previous prime is 1889648469859. The next prime is 1889648469883.

1889648469881 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1889648469881 - 2¹⁸ = 1889648207737 is a prime.

It is a super-2 number, since 2×1889648469881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1889648469796 and 1889648469805.

It is not an unprimeable number, because it can be changed into a prime (1889648469883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1940090345 + ... + 1940091318.

It is an arithmetic number, because the mean of its divisors is an integer number (473382163008).

Almost surely, 2^{1889648469881} is an apocalyptic number.

It is an amenable number.

1889648469881 is a deficient number, since it is larger than the sum of its proper divisors (3880182151).

1889648469881 is an equidigital number, since it uses as much as digits as its factorization.

1889648469881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880182150.

The product of its digits is 1528823808, while the sum is 80.

The spelling of 1889648469881 in words is "one trillion, eight hundred eighty-nine billion, six hundred forty-eight million, four hundred sixty-nine thousand, eight hundred eighty-one".