1889143348749 has 4 divisors (see below), whose sum is σ = 2518857798336. Its totient is φ = 1259428899164.

The previous prime is 1889143348711. The next prime is 1889143348769. The reversal of 1889143348749 is 9478433419881.

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 1889143348749 - 2¹⁶ = 1889143283213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889143348769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314857224789 + ... + 314857224794.

It is an arithmetic number, because the mean of its divisors is an integer number (629714449584).

Almost surely, 2^{1889143348749} is an apocalyptic number.

It is an amenable number.

1889143348749 is a deficient number, since it is larger than the sum of its proper divisors (629714449587).

1889143348749 is an equidigital number, since it uses as much as digits as its factorization.

1889143348749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629714449586.

The product of its digits is 167215104, while the sum is 69.

The spelling of 1889143348749 in words is "one trillion, eight hundred eighty-nine billion, one hundred forty-three million, three hundred forty-eight thousand, seven hundred forty-nine".