9191219191056 has 120 divisors (see below), whose sum is σ = 30191834247744. Its totient is φ = 2555087950080.

The previous prime is 9191219191043. The next prime is 9191219191061. The reversal of 9191219191056 is 6501919121919.

9191219191056 is a `hidden beast` number, since 9 + 191 + 219 + 191 + 0 + 56 = 666.

It is a super-2 number, since 2×9191219191056² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9191219190993 and 9191219191011.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123182610 + ... + 123257201.

Almost surely, 2^{9191219191056} is an apocalyptic number.

It is an amenable number.

9191219191056 is an abundant number, since it is smaller than the sum of its proper divisors (21000615056688).

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

9191219191056 is a wasteful number, since it uses less digits than its factorization.

9191219191056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246439869 (or 246439860 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 54.

The spelling of 9191219191056 in words is "nine trillion, one hundred ninety-one billion, two hundred nineteen million, one hundred ninety-one thousand, fifty-six".