1891910091892 has 12 divisors (see below), whose sum is σ = 3311250306336. Its totient is φ = 945838575800.

The previous prime is 1891910091829. The next prime is 1891910091941. The reversal of 1891910091892 is 2981900191981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29080984 + ... + 29145967.

It is an arithmetic number, because the mean of its divisors is an integer number (275937525528).

Almost surely, 2^{1891910091892} is an apocalyptic number.

It is an amenable number.

1891910091892 is a deficient number, since it is larger than the sum of its proper divisors (1419340214444).

1891910091892 is a wasteful number, since it uses less digits than its factorization.

1891910091892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58235078 (or 58235076 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 58.

The spelling of 1891910091892 in words is "one trillion, eight hundred ninety-one billion, nine hundred ten million, ninety-one thousand, eight hundred ninety-two".