9191864641 has 8 divisors (see below), whose sum is σ = 9224642720. Its totient is φ = 9159145632.

The previous prime is 9191864611. The next prime is 9191864719. The reversal of 9191864641 is 1464681919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9191864641 - 2⁵ = 9191864609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9191864611) 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, 309541 + ... + 337933.

It is an arithmetic number, because the mean of its divisors is an integer number (1153080340).

Almost surely, 2^9191864641 is an apocalyptic number.

It is an amenable number.

9191864641 is a deficient number, since it is larger than the sum of its proper divisors (32778079).

9191864641 is a wasteful number, since it uses less digits than its factorization.

9191864641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29535.

The product of its digits is 373248, while the sum is 49.

The square root of 9191864641 is about 95874.2125965058. The cubic root of 9191864641 is about 2094.7612915460.

The spelling of 9191864641 in words is "nine billion, one hundred ninety-one million, eight hundred sixty-four thousand, six hundred forty-one".