9994165491 has 4 divisors (see below), whose sum is σ = 13325553992. Its totient is φ = 6662776992.

The previous prime is 9994165477. The next prime is 9994165501. The reversal of 9994165491 is 1945614999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1945614999 = 3 ⋅648538333.

It is not a de Polignac number, because 9994165491 - 2¹⁴ = 9994149107 is a prime.

It is a super-2 number, since 2×9994165491² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9994165591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665694246 + ... + 1665694251.

It is an arithmetic number, because the mean of its divisors is an integer number (3331388498).

Almost surely, 2^9994165491 is an apocalyptic number.

9994165491 is a deficient number, since it is larger than the sum of its proper divisors (3331388501).

9994165491 is a wasteful number, since it uses less digits than its factorization.

9994165491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331388500.

The product of its digits is 3149280, while the sum is 57.

The square root of 9994165491 is about 99970.8231985713. The cubic root of 9994165491 is about 2154.0156062301.

The spelling of 9994165491 in words is "nine billion, nine hundred ninety-four million, one hundred sixty-five thousand, four hundred ninety-one".