99553644 has 48 divisors (see below), whose sum is σ = 261757440. Its totient is φ = 32714640.

The previous prime is 99553633. The next prime is 99553651. The reversal of 99553644 is 44635599.

99553644 is a `hidden beast` number, since 99 + 553 + 6 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 99553644.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177 + ... + 14159.

It is an arithmetic number, because the mean of its divisors is an integer number (5453280).

Almost surely, 2^99553644 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 99553644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130878720).

99553644 is an abundant number, since it is smaller than the sum of its proper divisors (162203796).

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

99553644 is a wasteful number, since it uses less digits than its factorization.

99553644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13067 (or 13059 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 99553644 is about 9977.6572400539. The cubic root of 99553644 is about 463.4672529519.

The spelling of 99553644 in words is "ninety-nine million, five hundred fifty-three thousand, six hundred forty-four".