9191956551 has 16 divisors (see below), whose sum is σ = 12692467200. Its totient is φ = 5910172128.

The previous prime is 9191956541. The next prime is 9191956577. The reversal of 9191956551 is 1556591919.

It is not a de Polignac number, because 9191956551 - 2⁵ = 9191956519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9191956494 and 9191956503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9191956511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22470 + ... + 137436.

It is an arithmetic number, because the mean of its divisors is an integer number (793279200).

Almost surely, 2^9191956551 is an apocalyptic number.

9191956551 is a deficient number, since it is larger than the sum of its proper divisors (3500510649).

9191956551 is a wasteful number, since it uses less digits than its factorization.

9191956551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115918.

The product of its digits is 546750, while the sum is 51.

The square root of 9191956551 is about 95874.6919212782. The cubic root of 9191956551 is about 2094.7682734036.

The spelling of 9191956551 in words is "nine billion, one hundred ninety-one million, nine hundred fifty-six thousand, five hundred fifty-one".