9991485224923 has 32 divisors (see below), whose sum is σ = 10687686912000. Its totient is φ = 9312891719040.

The previous prime is 9991485224911. The next prime is 9991485224927. The reversal of 9991485224923 is 3294225841999.

It is a cyclic number.

It is not a de Polignac number, because 9991485224923 - 2⁵ = 9991485224891 is a prime.

It is a super-2 number, since 2×9991485224923² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991485224927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1967987461 + ... + 1967992537.

It is an arithmetic number, because the mean of its divisors is an integer number (333990216000).

Almost surely, 2^{9991485224923} is an apocalyptic number.

9991485224923 is a deficient number, since it is larger than the sum of its proper divisors (696201687077).

9991485224923 is a wasteful number, since it uses less digits than its factorization.

9991485224923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7915.

The product of its digits is 100776960, while the sum is 67.

The spelling of 9991485224923 in words is "nine trillion, nine hundred ninety-one billion, four hundred eighty-five million, two hundred twenty-four thousand, nine hundred twenty-three".