7989154468 has 12 divisors (see below), whose sum is σ = 13982019100. Its totient is φ = 3994291872.

The previous prime is 7989154457. The next prime is 7989154469. The reversal of 7989154468 is 8644519897.

It can be written as a sum of positive squares in 2 ways, for example, as 837407844 + 7151746624 = 28938^2 + 84568^2 .

It is a super-2 number, since 2×7989154468² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7989154469) 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, 543 + ... + 126406.

Almost surely, 2^7989154468 is an apocalyptic number.

It is an amenable number.

7989154468 is a deficient number, since it is larger than the sum of its proper divisors (5992864632).

7989154468 is a wasteful number, since it uses less digits than its factorization.

7989154468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142686 (or 142684 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The square root of 7989154468 is about 89382.0701707003. The cubic root of 7989154468 is about 1999.0957969367.

The spelling of 7989154468 in words is "seven billion, nine hundred eighty-nine million, one hundred fifty-four thousand, four hundred sixty-eight".