1889431609698 has 12 divisors (see below), whose sum is σ = 4093768487718. Its totient is φ = 629810536560.

The previous prime is 1889431609649. The next prime is 1889431609717. The reversal of 1889431609698 is 8969061349881.

1889431609698 is a `hidden beast` number, since 1 + 8 + 8 + 9 + 4 + 3 + 1 + 609 + 6 + 9 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1883352756609 + 6078853089 = 1372353^2 + 77967^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52484211363 + ... + 52484211398.

Almost surely, 2^{1889431609698} is an apocalyptic number.

1889431609698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1889431609698 is an abundant number, since it is smaller than the sum of its proper divisors (2204336878020).

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

1889431609698 is a wasteful number, since it uses less digits than its factorization.

1889431609698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104968422769 (or 104968422766 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 72.

The spelling of 1889431609698 in words is "one trillion, eight hundred eighty-nine billion, four hundred thirty-one million, six hundred nine thousand, six hundred ninety-eight".