678960254604505 has 8 divisors (see below), whose sum is σ = 820220441805000. Its totient is φ = 539522779497216.

The previous prime is 678960254604497. The next prime is 678960254604509. The reversal of 678960254604505 is 505406452069876.

It can be written as a sum of positive squares in 4 ways, for example, as 3785970303049 + 675174284301456 = 1945757^2 + 25984116^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678960254604505 - 2³ = 678960254604497 is a prime.

It is a super-2 number, since 2×678960254604505² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678960254604509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455678022480 + ... + 455678023969.

It is an arithmetic number, because the mean of its divisors is an integer number (102527555225625).

Almost surely, 2^{678960254604505} is an apocalyptic number.

It is an amenable number.

678960254604505 is a deficient number, since it is larger than the sum of its proper divisors (141260187200495).

678960254604505 is a wasteful number, since it uses less digits than its factorization.

678960254604505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911356046603.

The product of its (nonzero) digits is 435456000, while the sum is 67.

The spelling of 678960254604505 in words is "six hundred seventy-eight trillion, nine hundred sixty billion, two hundred fifty-four million, six hundred four thousand, five hundred five".