78728227570 has 16 divisors (see below), whose sum is σ = 150046739928. Its totient is φ = 29638862080.

The previous prime is 78728227561. The next prime is 78728227573. The reversal of 78728227570 is 7572282787.

It can be written as a sum of positive squares in 4 ways, for example, as 78504754969 + 223472601 = 280187^2 + 14949^2 .

It is not an unprimeable number, because it can be changed into a prime (78728227573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231553441 + ... + 231553780.

Almost surely, 2^78728227570 is an apocalyptic number.

78728227570 is a deficient number, since it is larger than the sum of its proper divisors (71318512358).

78728227570 is a wasteful number, since it uses less digits than its factorization.

78728227570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463107245.

The product of its (nonzero) digits is 6146560, while the sum is 55.

The spelling of 78728227570 in words is "seventy-eight billion, seven hundred twenty-eight million, two hundred twenty-seven thousand, five hundred seventy".