9691242255 has 24 divisors (see below), whose sum is σ = 16817160672. Its totient is φ = 5162814144.

The previous prime is 9691242251. The next prime is 9691242259. The reversal of 9691242255 is 5522421969.

9691242255 is a `hidden beast` number, since 96 + 91 + 2 + 422 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (9691242251) and next prime (9691242259).

It is not a de Polignac number, because 9691242255 - 2² = 9691242251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 9691242255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9691242251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81484 + ... + 161313.

It is an arithmetic number, because the mean of its divisors is an integer number (700715028).

Almost surely, 2^9691242255 is an apocalyptic number.

9691242255 is a deficient number, since it is larger than the sum of its proper divisors (7125918417).

9691242255 is a wasteful number, since it uses less digits than its factorization.

9691242255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243695 (or 243692 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 9691242255 is about 98444.1072639698. The cubic root of 9691242255 is about 2132.0292075095.

The spelling of 9691242255 in words is "nine billion, six hundred ninety-one million, two hundred forty-two thousand, two hundred fifty-five".