1806889269389 has 16 divisors (see below), whose sum is σ = 1914562785600. Its totient is φ = 1700509860864.

The previous prime is 1806889269373. The next prime is 1806889269401. The reversal of 1806889269389 is 9839629886081.

It is a cyclic number.

It is not a de Polignac number, because 1806889269389 - 2⁴ = 1806889269373 is a prime.

It is a super-2 number, since 2×1806889269389² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806889269349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1264109 + ... + 2282925.

It is an arithmetic number, because the mean of its divisors is an integer number (119660174100).

Almost surely, 2^{1806889269389} is an apocalyptic number.

1806889269389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1806889269389 is a deficient number, since it is larger than the sum of its proper divisors (107673516211).

1806889269389 is a wasteful number, since it uses less digits than its factorization.

1806889269389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019452.

The product of its (nonzero) digits is 644972544, while the sum is 77.

The spelling of 1806889269389 in words is "one trillion, eight hundred six billion, eight hundred eighty-nine million, two hundred sixty-nine thousand, three hundred eighty-nine".