79541803818 has 28 divisors (see below), whose sum is σ = 178887228738. Its totient is φ = 26513934120.

The previous prime is 79541803807. The next prime is 79541803949. The reversal of 79541803818 is 81830814597.

79541803818 is a `hidden beast` number, since 7 + 9 + 541 + 80 + 3 + 8 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63445045689 + 16096758129 = 251883^2 + 126873^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 13 ways as a sum of consecutive naturals, for example, 27276253 + ... + 27279168.

Almost surely, 2^79541803818 is an apocalyptic number.

79541803818 is an abundant number, since it is smaller than the sum of its proper divisors (99345424920).

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

79541803818 is an equidigital number, since it uses as much as digits as its factorization.

79541803818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54555441 (or 54555426 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 79541803818 in words is "seventy-nine billion, five hundred forty-one million, eight hundred three thousand, eight hundred eighteen".