9191910091010 has 16 divisors (see below), whose sum is σ = 16545487937472. Its totient is φ = 3676752975600.

The previous prime is 9191910090977. The next prime is 9191910091019. The reversal of 9191910091010 is 101900191919.

It is a happy number.

It is a super-2 number, since 2×9191910091010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9191910091019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2674715 + ... + 5053505.

It is an arithmetic number, because the mean of its divisors is an integer number (1034092996092).

Almost surely, 2^{9191910091010} is an apocalyptic number.

9191910091010 is a deficient number, since it is larger than the sum of its proper divisors (7353577846462).

9191910091010 is a wasteful number, since it uses less digits than its factorization.

9191910091010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765209.

The product of its (nonzero) digits is 6561, while the sum is 41.

The spelling of 9191910091010 in words is "nine trillion, one hundred ninety-one billion, nine hundred ten million, ninety-one thousand, ten".