1889211388128 has 24 divisors (see below), whose sum is σ = 4959179894088. Its totient is φ = 629737129344.

The previous prime is 1889211388063. The next prime is 1889211388151. The reversal of 1889211388128 is 8218831129881.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9839642551 + ... + 9839642742.

It is an arithmetic number, because the mean of its divisors is an integer number (206632495587).

Almost surely, 2^{1889211388128} is an apocalyptic number.

It is an amenable number.

1889211388128 is an abundant number, since it is smaller than the sum of its proper divisors (3069968505960).

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

1889211388128 is a wasteful number, since it uses less digits than its factorization.

1889211388128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19679285306 (or 19679285298 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 60.

The spelling of 1889211388128 in words is "one trillion, eight hundred eighty-nine billion, two hundred eleven million, three hundred eighty-eight thousand, one hundred twenty-eight".