919791228056 has 32 divisors (see below), whose sum is σ = 1784371783680. Its totient is φ = 444027597600.

The previous prime is 919791228017. The next prime is 919791228091. The reversal of 919791228056 is 650822197919.

It is a junction number, because it is equal to n+sod(n) for n = 919791227986 and 919791228004.

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 7 ways as a sum of consecutive naturals, for example, 4195706 + ... + 4409481.

It is an arithmetic number, because the mean of its divisors is an integer number (55761618240).

Almost surely, 2^919791228056 is an apocalyptic number.

It is an amenable number.

919791228056 is a deficient number, since it is larger than the sum of its proper divisors (864580555624).

919791228056 is a wasteful number, since it uses less digits than its factorization.

919791228056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8605655 (or 8605651 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 919791228056 in words is "nine hundred nineteen billion, seven hundred ninety-one million, two hundred twenty-eight thousand, fifty-six".