1627111989889 has 3 divisors (see below), whose sum is σ = 1627113265473. Its totient is φ = 1627110714306.

The previous prime is 1627111989887. The next prime is 1627111989967. The reversal of 1627111989889 is 9889891117261.

The square root of 1627111989889 is 1275583.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1627111989889 - 2¹ = 1627111989887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1627111989887) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 637792 + ... + 1913374.

It is an arithmetic number, because the mean of its divisors is an integer number (542371088491).

Almost surely, 2^{1627111989889} is an apocalyptic number.

1627111989889 is the 1275583-rd square number.

1627111989889 is the 637792-nd centered octagonal number.

It is an amenable number.

1627111989889 is a deficient number, since it is larger than the sum of its proper divisors (1275584).

1627111989889 is an frugal number, since it uses more digits than its factorization.

1627111989889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551166 (or 1275583 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 70.

The spelling of 1627111989889 in words is "one trillion, six hundred twenty-seven billion, one hundred eleven million, nine hundred eighty-nine thousand, eight hundred eighty-nine".