7989055487999 has 4 divisors (see below), whose sum is σ = 8174847476136. Its totient is φ = 7803263499864.

The previous prime is 7989055487981. The next prime is 7989055488031. The reversal of 7989055487999 is 9997845509897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7989055487999 - 2¹⁶ = 7989055422463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989055487909) 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, 92895994004 + ... + 92895994089.

It is an arithmetic number, because the mean of its divisors is an integer number (2043711869034).

Almost surely, 2^{7989055487999} is an apocalyptic number.

7989055487999 is a deficient number, since it is larger than the sum of its proper divisors (185791988137).

7989055487999 is a wasteful number, since it uses less digits than its factorization.

7989055487999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185791988136.

The product of its (nonzero) digits is 18517766400, while the sum is 89.

The spelling of 7989055487999 in words is "seven trillion, nine hundred eighty-nine billion, fifty-five million, four hundred eighty-seven thousand, nine hundred ninety-nine".