678134740005 has 12 divisors (see below), whose sum is σ = 1175433549420. Its totient is φ = 361671861312.

The previous prime is 678134740001. The next prime is 678134740043. The reversal of 678134740005 is 500047431876.

It can be written as a sum of positive squares in 2 ways, for example, as 324664062849 + 353470677156 = 569793^2 + 594534^2 .

It is not a de Polignac number, because 678134740005 - 2² = 678134740001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 15069660889 = 678134740005 / (6 + 7 + 8 + 1 + 3 + 4 + 7 + 4 + 0 + 0 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678134740001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7534830400 + ... + 7534830489.

It is an arithmetic number, because the mean of its divisors is an integer number (97952795785).

Almost surely, 2^678134740005 is an apocalyptic number.

It is an amenable number.

678134740005 is a deficient number, since it is larger than the sum of its proper divisors (497298809415).

678134740005 is a wasteful number, since it uses less digits than its factorization.

678134740005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15069660900 (or 15069660897 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 678134740005 in words is "six hundred seventy-eight billion, one hundred thirty-four million, seven hundred forty thousand, five".