78504091488 has 192 divisors, whose sum is σ = 236713881600. Its totient is φ = 25285616640.

The previous prime is 78504091433. The next prime is 78504091489. The reversal of 78504091488 is 88419040587.

78504091488 is a `hidden beast` number, since 7 + 8 + 504 + 0 + 91 + 48 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78504091489) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21666445 + ... + 21670067.

It is an arithmetic number, because the mean of its divisors is an integer number (1232884800).

Almost surely, 2^78504091488 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 78504091488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118356940800).

78504091488 is an abundant number, since it is smaller than the sum of its proper divisors (158209790112).

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

78504091488 is a wasteful number, since it uses less digits than its factorization.

78504091488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482 (or 4468 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The spelling of 78504091488 in words is "seventy-eight billion, five hundred four million, ninety-one thousand, four hundred eighty-eight".