676981972385 has 4 divisors (see below), whose sum is σ = 812378366868. Its totient is φ = 541585577904.

The previous prime is 676981972369. The next prime is 676981972393. The reversal of 676981972385 is 583279189676.

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 453753126544 + 223228845841 = 673612^2 + 472471^2 .

It is a cyclic number.

It is not a de Polignac number, because 676981972385 - 2⁴ = 676981972369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67698197234 + ... + 67698197243.

It is an arithmetic number, because the mean of its divisors is an integer number (203094591717).

Almost surely, 2^676981972385 is an apocalyptic number.

It is an amenable number.

676981972385 is a deficient number, since it is larger than the sum of its proper divisors (135396394483).

676981972385 is a wasteful number, since it uses less digits than its factorization.

676981972385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135396394482.

The product of its digits is 274337280, while the sum is 71.

The spelling of 676981972385 in words is "six hundred seventy-six billion, nine hundred eighty-one million, nine hundred seventy-two thousand, three hundred eighty-five".