99851353909 has 4 divisors (see below), whose sum is σ = 100249168320. Its totient is φ = 99453539500.

The previous prime is 99851353873. The next prime is 99851353913. The reversal of 99851353909 is 90935315899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99851353909 - 2⁹ = 99851353397 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 (99851353919) 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, 198906829 + ... + 198907330.

It is an arithmetic number, because the mean of its divisors is an integer number (25062292080).

Almost surely, 2^99851353909 is an apocalyptic number.

It is an amenable number.

99851353909 is a deficient number, since it is larger than the sum of its proper divisors (397814411).

99851353909 is a wasteful number, since it uses less digits than its factorization.

99851353909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397814410.

The product of its (nonzero) digits is 11809800, while the sum is 61.

The spelling of 99851353909 in words is "ninety-nine billion, eight hundred fifty-one million, three hundred fifty-three thousand, nine hundred nine".