99851643072 has 84 divisors (see below), whose sum is σ = 293942085216. Its totient is φ = 32384309760.

The previous prime is 99851643053. The next prime is 99851643107. The reversal of 99851643072 is 27034615899.

99851643072 is a `hidden beast` number, since 9 + 98 + 51 + 6 + 430 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2321304 + ... + 2363927.

It is a 1-persistent number, because it is pandigital, but 2⋅99851643072 = 199703286144 is not.

Almost surely, 2^99851643072 is an apocalyptic number.

It is an amenable number.

99851643072 is an abundant number, since it is smaller than the sum of its proper divisors (194090442144).

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

99851643072 is a wasteful number, since it uses less digits than its factorization.

99851643072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685286 (or 4685273 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 99851643072 in words is "ninety-nine billion, eight hundred fifty-one million, six hundred forty-three thousand, seventy-two".