678097842613 has 18 divisors (see below), whose sum is σ = 723376473506. Its totient is φ = 635523928704.

The previous prime is 678097842581. The next prime is 678097842619. The reversal of 678097842613 is 316248790876.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 450070582129 + 228027260484 = 670873^2 + 477522^2 .

It is not a de Polignac number, because 678097842613 - 2⁵ = 678097842581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678097842619) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16487431 + ... + 16528507.

Almost surely, 2^678097842613 is an apocalyptic number.

It is an amenable number.

678097842613 is a deficient number, since it is larger than the sum of its proper divisors (45278630893).

678097842613 is an equidigital number, since it uses as much as digits as its factorization.

678097842613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41589 (or 41333 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 678097842613 in words is "six hundred seventy-eight billion, ninety-seven million, eight hundred forty-two thousand, six hundred thirteen".