191090798468 has 12 divisors (see below), whose sum is σ = 354080009052. Its totient is φ = 89925081600.

The previous prime is 191090798453. The next prime is 191090798473. The reversal of 191090798468 is 864897090191.

It can be written as a sum of positive squares in 2 ways, for example, as 175199170624 + 15891627844 = 418568^2 + 126062^2 .

It is a super-2 number, since 2×191090798468² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191090798468.

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, 1405079333 + ... + 1405079468.

It is an arithmetic number, because the mean of its divisors is an integer number (29506667421).

Almost surely, 2^191090798468 is an apocalyptic number.

It is an amenable number.

191090798468 is a deficient number, since it is larger than the sum of its proper divisors (162989210584).

191090798468 is a wasteful number, since it uses less digits than its factorization.

191090798468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810158822 (or 2810158820 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 191090798468 in words is "one hundred ninety-one billion, ninety million, seven hundred ninety-eight thousand, four hundred sixty-eight".