15598420991999 has 8 divisors (see below), whose sum is σ = 16279096674960. Its totient is φ = 14927265248896.

The previous prime is 15598420991963. The next prime is 15598420992059. The reversal of 15598420991999 is 99919902489551.

It is a happy number.

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 15598420991999 - 2⁴⁰ = 14498909364223 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 (15598420994999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2379981617 + ... + 2379988170.

It is an arithmetic number, because the mean of its divisors is an integer number (2034887084370).

Almost surely, 2^{15598420991999} is an apocalyptic number.

15598420991999 is a deficient number, since it is larger than the sum of its proper divisors (680675682961).

15598420991999 is a wasteful number, since it uses less digits than its factorization.

15598420991999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4759969929.

The product of its (nonzero) digits is 850305600, while the sum is 80.

The spelling of 15598420991999 in words is "fifteen trillion, five hundred ninety-eight billion, four hundred twenty million, nine hundred ninety-one thousand, nine hundred ninety-nine".