99781080448 has 128 divisors (see below), whose sum is σ = 235255003200. Its totient is φ = 41246392320.

The previous prime is 99781080401. The next prime is 99781080467. The reversal of 99781080448 is 84408018799.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a junction number, because it is equal to n+sod(n) for n = 99781080392 and 99781080401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46172488 + ... + 46174648.

Almost surely, 2^99781080448 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 99781080448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117627501600).

99781080448 is an abundant number, since it is smaller than the sum of its proper divisors (135473922752).

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

99781080448 is a wasteful number, since it uses less digits than its factorization.

99781080448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988 (or 3976 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 99781080448 in words is "ninety-nine billion, seven hundred eighty-one million, eighty thousand, four hundred forty-eight".