78404881141 has 4 divisors (see below), whose sum is σ = 78433363692. Its totient is φ = 78376398592.

The previous prime is 78404881123. The next prime is 78404881151. The reversal of 78404881141 is 14118840487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55700720100 + 22704161041 = 236010^2 + 150679^2 .

It is a cyclic number.

It is not a de Polignac number, because 78404881141 - 2⁵ = 78404881109 is a prime.

It is a super-2 number, since 2×78404881141² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78404881091 and 78404881100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78404881111) 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 3 ways as a sum of consecutive naturals, for example, 14237146 + ... + 14242651.

It is an arithmetic number, because the mean of its divisors is an integer number (19608340923).

Almost surely, 2^78404881141 is an apocalyptic number.

It is an amenable number.

78404881141 is a deficient number, since it is larger than the sum of its proper divisors (28482551).

78404881141 is a wasteful number, since it uses less digits than its factorization.

78404881141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28482550.

The product of its (nonzero) digits is 229376, while the sum is 46.

The spelling of 78404881141 in words is "seventy-eight billion, four hundred four million, eight hundred eighty-one thousand, one hundred forty-one".