9991354029255 has 48 divisors (see below), whose sum is σ = 17387708126880. Its totient is φ = 5307411859200.

The previous prime is 9991354029233. The next prime is 9991354029289. The reversal of 9991354029255 is 5529204531999.

9991354029255 is a `hidden beast` number, since 9 + 9 + 9 + 1 + 354 + 0 + 29 + 255 = 666.

It is not a de Polignac number, because 9991354029255 - 2⁴³ = 1195261007047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9991354029192 and 9991354029201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14879301 + ... + 15536289.

It is an arithmetic number, because the mean of its divisors is an integer number (362243919310).

Almost surely, 2^{9991354029255} is an apocalyptic number.

9991354029255 is a deficient number, since it is larger than the sum of its proper divisors (7396354097625).

9991354029255 is a wasteful number, since it uses less digits than its factorization.

9991354029255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658352 (or 658349 counting only the distinct ones).

The product of its (nonzero) digits is 39366000, while the sum is 63.

The spelling of 9991354029255 in words is "nine trillion, nine hundred ninety-one billion, three hundred fifty-four million, twenty-nine thousand, two hundred fifty-five".