8651199991 has 8 divisors (see below), whose sum is σ = 9892720640. Its totient is φ = 7411088088.

The previous prime is 8651199983. The next prime is 8651200027. The reversal of 8651199991 is 1999911568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8651199991 - 2³ = 8651199983 is a prime.

It is a super-2 number, since 2×8651199991² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8651199941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338991 + ... + 363616.

It is an arithmetic number, because the mean of its divisors is an integer number (1236590080).

Almost surely, 2^8651199991 is an apocalyptic number.

8651199991 is a deficient number, since it is larger than the sum of its proper divisors (1241520649).

8651199991 is a wasteful number, since it uses less digits than its factorization.

8651199991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704373.

The product of its digits is 1574640, while the sum is 58.

The square root of 8651199991 is about 93011.8271565504. The cubic root of 8651199991 is about 2052.8574066482.

The spelling of 8651199991 in words is "eight billion, six hundred fifty-one million, one hundred ninety-nine thousand, nine hundred ninety-one".