78215134284 has 144 divisors (see below), whose sum is σ = 247496558400. Its totient is φ = 20307345408.

The previous prime is 78215134243. The next prime is 78215134297. The reversal of 78215134284 is 48243151287.

78215134284 is a `hidden beast` number, since 7 + 8 + 215 + 1 + 3 + 428 + 4 = 666.

It is a super-2 number, since 2×78215134284² (a number of 23 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 190549 + ... + 439020.

It is an arithmetic number, because the mean of its divisors is an integer number (1718726100).

Almost surely, 2^78215134284 is an apocalyptic number.

It is an amenable number.

78215134284 is an abundant number, since it is smaller than the sum of its proper divisors (169281424116).

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

78215134284 is a wasteful number, since it uses less digits than its factorization.

78215134284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629632 (or 629627 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The spelling of 78215134284 in words is "seventy-eight billion, two hundred fifteen million, one hundred thirty-four thousand, two hundred eighty-four".