7998558998 has 8 divisors (see below), whose sum is σ = 12194524560. Its totient is φ = 3933717480.

The previous prime is 7998558979. The next prime is 7998559033. The reversal of 7998558998 is 8998558997.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32780858 + ... + 32781101.

It is an arithmetic number, because the mean of its divisors is an integer number (1524315570).

Almost surely, 2^7998558998 is an apocalyptic number.

7998558998 is a deficient number, since it is larger than the sum of its proper divisors (4195965562).

7998558998 is a wasteful number, since it uses less digits than its factorization.

7998558998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65562022.

The product of its digits is 587865600, while the sum is 77.

The square root of 7998558998 is about 89434.6632911423. The cubic root of 7998558998 is about 1999.8799092893.

Subtracting 7998558998 from its reverse (8998558997), we obtain a palindrome (999999999).

The spelling of 7998558998 in words is "seven billion, nine hundred ninety-eight million, five hundred fifty-eight thousand, nine hundred ninety-eight".