789878315520 has 240 divisors, whose sum is σ = 3126367221120. Its totient is φ = 180543578112.

The previous prime is 789878315507. The next prime is 789878315521. The reversal of 789878315520 is 25513878987.

789878315520 is a `hidden beast` number, since 7 + 8 + 9 + 8 + 78 + 3 + 1 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is not an unprimeable number, because it can be changed into a prime (789878315521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2287500 + ... + 2610059.

It is an arithmetic number, because the mean of its divisors is an integer number (13026530088).

Almost surely, 2^789878315520 is an apocalyptic number.

789878315520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

789878315520 is an abundant number, since it is smaller than the sum of its proper divisors (2336488905600).

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

789878315520 is a wasteful number, since it uses less digits than its factorization.

789878315520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897595 (or 4897576 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 63.

The spelling of 789878315520 in words is "seven hundred eighty-nine billion, eight hundred seventy-eight million, three hundred fifteen thousand, five hundred twenty".