99021859555 has 4 divisors (see below), whose sum is σ = 118826231472. Its totient is φ = 79217487640.

The previous prime is 99021859537. The next prime is 99021859631. The reversal of 99021859555 is 55595812099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55595812099 = 439 ⋅126641941.

It is not a de Polignac number, because 99021859555 - 2³³ = 90431924963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99021859555.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9902185951 + ... + 9902185960.

It is an arithmetic number, because the mean of its divisors is an integer number (29706557868).

Almost surely, 2^99021859555 is an apocalyptic number.

99021859555 is a deficient number, since it is larger than the sum of its proper divisors (19804371917).

99021859555 is a wasteful number, since it uses less digits than its factorization.

99021859555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19804371916.

The product of its (nonzero) digits is 7290000, while the sum is 58.

The spelling of 99021859555 in words is "ninety-nine billion, twenty-one million, eight hundred fifty-nine thousand, five hundred fifty-five".