9994564431 has 24 divisors (see below), whose sum is σ = 15211754160. Its totient is φ = 6480911088.

The previous prime is 9994564403. The next prime is 9994564439. The reversal of 9994564431 is 1344654999.

It is a happy number.

It is not a de Polignac number, because 9994564431 - 2¹³ = 9994556239 is a prime.

It is a super-2 number, since 2×9994564431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9994564439) 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, 3158256 + ... + 3161418.

It is an arithmetic number, because the mean of its divisors is an integer number (633823090).

Almost surely, 2^9994564431 is an apocalyptic number.

9994564431 is a deficient number, since it is larger than the sum of its proper divisors (5217189729).

9994564431 is an frugal number, since it uses more digits than its factorization.

9994564431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372 (or 3203 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 9994564431 is about 99972.8184608196. The cubic root of 9994564431 is about 2154.0442666704.

The spelling of 9994564431 in words is "nine billion, nine hundred ninety-four million, five hundred sixty-four thousand, four hundred thirty-one".