878258384640 has 1152 divisors, whose sum is σ = 4061695518720. Its totient is φ = 174392082432.

The previous prime is 878258384621. The next prime is 878258384687. The reversal of 878258384640 is 46483852878.

878258384640 is a `hidden beast` number, since 8 + 7 + 8 + 2 + 583 + 8 + 4 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (63).

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 127 ways as a sum of consecutive naturals, for example, 53456107 + ... + 53472533.

It is an arithmetic number, because the mean of its divisors is an integer number (3525777360).

Almost surely, 2^878258384640 is an apocalyptic number.

878258384640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 878258384640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2030847759360).

878258384640 is an abundant number, since it is smaller than the sum of its proper divisors (3183437134080).

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

878258384640 is a wasteful number, since it uses less digits than its factorization.

878258384640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16494 (or 16474 counting only the distinct ones).

The product of its (nonzero) digits is 82575360, while the sum is 63.

The spelling of 878258384640 in words is "eight hundred seventy-eight billion, two hundred fifty-eight million, three hundred eighty-four thousand, six hundred forty".