99775545856 has 160 divisors (see below), whose sum is σ = 236522183040. Its totient is φ = 41141108736.

The previous prime is 99775545839. The next prime is 99775545893. The reversal of 99775545856 is 65854557799.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32530435 + ... + 32533501.

It is an arithmetic number, because the mean of its divisors is an integer number (1478263644).

Almost surely, 2^99775545856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99775545856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118261091520).

99775545856 is an abundant number, since it is smaller than the sum of its proper divisors (136746637184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99775545856 is a wasteful number, since it uses less digits than its factorization.

99775545856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434 (or 3418 counting only the distinct ones).

The product of its digits is 476280000, while the sum is 70.

The spelling of 99775545856 in words is "ninety-nine billion, seven hundred seventy-five million, five hundred forty-five thousand, eight hundred fifty-six".