78571727484 has 12 divisors (see below), whose sum is σ = 183334030824. Its totient is φ = 26190575824.

The previous prime is 78571727459. The next prime is 78571727489. The reversal of 78571727484 is 48472717587.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78571727489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3273821967 + ... + 3273821990.

It is an arithmetic number, because the mean of its divisors is an integer number (15277835902).

Almost surely, 2^78571727484 is an apocalyptic number.

It is an amenable number.

78571727484 is an abundant number, since it is smaller than the sum of its proper divisors (104762303340).

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

78571727484 is a wasteful number, since it uses less digits than its factorization.

78571727484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6547643964 (or 6547643962 counting only the distinct ones).

The product of its digits is 24586240, while the sum is 60.

The spelling of 78571727484 in words is "seventy-eight billion, five hundred seventy-one million, seven hundred twenty-seven thousand, four hundred eighty-four".