99878782432 has 192 divisors, whose sum is σ = 248266093824. Its totient is φ = 38851338240.

The previous prime is 99878782403. The next prime is 99878782447. The reversal of 99878782432 is 23428787899.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5202483 + ... + 5221645.

It is an arithmetic number, because the mean of its divisors is an integer number (1293052572).

Almost surely, 2^99878782432 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 99878782432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124133046912).

99878782432 is an abundant number, since it is smaller than the sum of its proper divisors (148387311392).

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

99878782432 is a wasteful number, since it uses less digits than its factorization.

99878782432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19281 (or 19273 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 67.

The spelling of 99878782432 in words is "ninety-nine billion, eight hundred seventy-eight million, seven hundred eighty-two thousand, four hundred thirty-two".