678996495827 has 32 divisors (see below), whose sum is σ = 742277652480. Its totient is φ = 617376453120.

The previous prime is 678996495809. The next prime is 678996495829. The reversal of 678996495827 is 728594699876.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678996495827 is a prime.

It is a super-2 number, since 2×678996495827² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678996495829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239672603 + ... + 239675435.

It is an arithmetic number, because the mean of its divisors is an integer number (23196176640).

Almost surely, 2^678996495827 is an apocalyptic number.

678996495827 is a deficient number, since it is larger than the sum of its proper divisors (63281156653).

678996495827 is a wasteful number, since it uses less digits than its factorization.

678996495827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963.

The product of its digits is 3292047360, while the sum is 80.

The spelling of 678996495827 in words is "six hundred seventy-eight billion, nine hundred ninety-six million, four hundred ninety-five thousand, eight hundred twenty-seven".