999653947288 has 32 divisors (see below), whose sum is σ = 1924486779600. Its totient is φ = 486536819328.

The previous prime is 999653947249. The next prime is 999653947289. The reversal of 999653947288 is 882749356999.

It is a super-3 number, since 3×999653947288³ (a number of 37 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (79) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999653947289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4858203 + ... + 5059786.

Almost surely, 2^999653947288 is an apocalyptic number.

It is an amenable number.

999653947288 is a deficient number, since it is larger than the sum of its proper divisors (924832832312).

999653947288 is a wasteful number, since it uses less digits than its factorization.

999653947288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9918331 (or 9918327 counting only the distinct ones).

The product of its digits is 2116316160, while the sum is 79.

The spelling of 999653947288 in words is "nine hundred ninety-nine billion, six hundred fifty-three million, nine hundred forty-seven thousand, two hundred eighty-eight".