8991344619 has 12 divisors (see below), whose sum is σ = 13031827536. Its totient is φ = 5973769872.

The previous prime is 8991344617. The next prime is 8991344623. The reversal of 8991344619 is 9164431998.

It is a happy number.

8991344619 is a `hidden beast` number, since 8 + 9 + 9 + 13 + 4 + 4 + 619 = 666.

It is not a de Polignac number, because 8991344619 - 2¹ = 8991344617 is a prime.

It is a super-2 number, since 2×8991344619² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8991344617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1702207 + ... + 1707480.

It is an arithmetic number, because the mean of its divisors is an integer number (1085985628).

Almost surely, 2^8991344619 is an apocalyptic number.

8991344619 is a deficient number, since it is larger than the sum of its proper divisors (4040482917).

8991344619 is a wasteful number, since it uses less digits than its factorization.

8991344619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409986 (or 3409983 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 8991344619 is about 94822.7009687026. The cubic root of 8991344619 is about 2079.4167974002.

The spelling of 8991344619 in words is "eight billion, nine hundred ninety-one million, three hundred forty-four thousand, six hundred nineteen".