678103871291 has 16 divisors (see below), whose sum is σ = 845881209600. Its totient is φ = 528109498080.

The previous prime is 678103871281. The next prime is 678103871353. The reversal of 678103871291 is 192178301876.

It is a cyclic number.

It is not a de Polignac number, because 678103871291 - 2³⁸ = 403225964347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678103871201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2214716 + ... + 2502233.

It is an arithmetic number, because the mean of its divisors is an integer number (52867575600).

Almost surely, 2^678103871291 is an apocalyptic number.

678103871291 is a deficient number, since it is larger than the sum of its proper divisors (167777338309).

678103871291 is a wasteful number, since it uses less digits than its factorization.

678103871291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4718834.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The spelling of 678103871291 in words is "six hundred seventy-eight billion, one hundred three million, eight hundred seventy-one thousand, two hundred ninety-one".