99999772200 has 72 divisors (see below), whose sum is σ = 335832574350. Its totient is φ = 26666605440.

The previous prime is 99999772183. The next prime is 99999772211. The reversal of 99999772200 is 227799999.

It can be written as a sum of positive squares in 3 ways, for example, as 84509978436 + 15489793764 = 290706^2 + 124458^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27775915 + ... + 27779514.

Almost surely, 2^99999772200 is an apocalyptic number.

99999772200 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99999772200 is an abundant number, since it is smaller than the sum of its proper divisors (235832802150).

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

99999772200 is a wasteful number, since it uses less digits than its factorization.

99999772200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55555451 (or 55555439 counting only the distinct ones).

The product of its (nonzero) digits is 11573604, while the sum is 63.

The spelling of 99999772200 in words is "ninety-nine billion, nine hundred ninety-nine million, seven hundred seventy-two thousand, two hundred".