79569381042 has 54 divisors (see below), whose sum is σ = 183184900509. Its totient is φ = 24956560320.

The previous prime is 79569381041. The next prime is 79569381049. The reversal of 79569381042 is 24018396597.

79569381042 is a `hidden beast` number, since 7 + 9 + 569 + 38 + 1 + 0 + 42 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 72823879881 + 6745501161 = 269859^2 + 82131^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=199461.

It is a self number, because there is not a number n which added to its sum of digits gives 79569381042.

It is not an unprimeable number, because it can be changed into a prime (79569381041) 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 26 ways as a sum of consecutive naturals, for example, 20343067 + ... + 20346977.

It is a 2-persistent number, because it is pandigital, and so is 2⋅79569381042 = 159138762084, but 3⋅79569381042 = 238708143126 is not.

Almost surely, 2^79569381042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79569381042

79569381042 is an abundant number, since it is smaller than the sum of its proper divisors (103615519467).

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

79569381042 is an equidigital number, since it uses as much as digits as its factorization.

79569381042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864 (or 3933 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 79569381042 in words is "seventy-nine billion, five hundred sixty-nine million, three hundred eighty-one thousand, forty-two".