678519497456 has 20 divisors (see below), whose sum is σ = 1314662210400. Its totient is φ = 339251830272.

The previous prime is 678519497431. The next prime is 678519497459. The reversal of 678519497456 is 654794915876.

It is a hoax number, since the sum of its digits (71) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 678519497456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678519497459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245600 + ... + 1190528.

It is an arithmetic number, because the mean of its divisors is an integer number (65733110520).

Almost surely, 2^678519497456 is an apocalyptic number.

It is an amenable number.

678519497456 is a deficient number, since it is larger than the sum of its proper divisors (636142712944).

678519497456 is a wasteful number, since it uses less digits than its factorization.

678519497456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989816 (or 989810 counting only the distinct ones).

The product of its digits is 457228800, while the sum is 71.

The spelling of 678519497456 in words is "six hundred seventy-eight billion, five hundred nineteen million, four hundred ninety-seven thousand, four hundred fifty-six".