678787920032 has 24 divisors (see below), whose sum is σ = 1338529662036. Its totient is φ = 338843878912.

The previous prime is 678787920023. The next prime is 678787920047. The reversal of 678787920032 is 230029787876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 408009227536 + 270778692496 = 638756^2 + 520364^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17169983 + ... + 17209470.

Almost surely, 2^678787920032 is an apocalyptic number.

It is an amenable number.

678787920032 is a deficient number, since it is larger than the sum of its proper divisors (659741742004).

678787920032 is a wasteful number, since it uses less digits than its factorization.

678787920032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34380080 (or 34380072 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 678787920032 in words is "six hundred seventy-eight billion, seven hundred eighty-seven million, nine hundred twenty thousand, thirty-two".