78518719520 has 192 divisors, whose sum is σ = 197530970112. Its totient is φ = 29445120000.

The previous prime is 78518719511. The next prime is 78518719523. The reversal of 78518719520 is 2591781587.

It is not an unprimeable number, because it can be changed into a prime (78518719523) 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, 30706082 + ... + 30708638.

It is an arithmetic number, because the mean of its divisors is an integer number (1028807136).

Almost surely, 2^78518719520 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 78518719520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98765485056).

78518719520 is an abundant number, since it is smaller than the sum of its proper divisors (119012250592).

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

78518719520 is a wasteful number, since it uses less digits than its factorization.

78518719520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 53.

The spelling of 78518719520 in words is "seventy-eight billion, five hundred eighteen million, seven hundred nineteen thousand, five hundred twenty".