678787315004 has 24 divisors (see below), whose sum is σ = 1189895192640. Its totient is φ = 338817613824.

The previous prime is 678787314977. The next prime is 678787315009. The reversal of 678787315004 is 400513787876.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678787315009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7933517 + ... + 8018619.

It is an arithmetic number, because the mean of its divisors is an integer number (49578966360).

Almost surely, 2^678787315004 is an apocalyptic number.

It is an amenable number.

678787315004 is a deficient number, since it is larger than the sum of its proper divisors (511107877636).

678787315004 is a wasteful number, since it uses less digits than its factorization.

678787315004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88469 (or 88467 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 678787315004 in words is "six hundred seventy-eight billion, seven hundred eighty-seven million, three hundred fifteen thousand, four".