78328904141 has 4 divisors (see below), whose sum is σ = 78352636284. Its totient is φ = 78305172000.

The previous prime is 78328904123. The next prime is 78328904197. The reversal of 78328904141 is 14140982387.

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 47271891241 + 31057012900 = 217421^2 + 176230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78328904141 is a prime.

It is a super-2 number, since 2×78328904141² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78328904111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11861120 + ... + 11867721.

It is an arithmetic number, because the mean of its divisors is an integer number (19588159071).

Almost surely, 2^78328904141 is an apocalyptic number.

It is an amenable number.

78328904141 is a deficient number, since it is larger than the sum of its proper divisors (23732143).

78328904141 is a wasteful number, since it uses less digits than its factorization.

78328904141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23732142.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 78328904141 in words is "seventy-eight billion, three hundred twenty-eight million, nine hundred four thousand, one hundred forty-one".