680202165578 has 8 divisors (see below), whose sum is σ = 1098788113668. Its totient is φ = 313939461024.

The previous prime is 680202165569. The next prime is 680202165613. The reversal of 680202165578 is 875561202086.

It can be written as a sum of positive squares in 2 ways, for example, as 522487545889 + 157714619689 = 722833^2 + 397133^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13080810851 + ... + 13080810902.

Almost surely, 2^680202165578 is an apocalyptic number.

680202165578 is a deficient number, since it is larger than the sum of its proper divisors (418585948090).

680202165578 is a wasteful number, since it uses less digits than its factorization.

680202165578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26161621768.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 680202165578 in words is "six hundred eighty billion, two hundred two million, one hundred sixty-five thousand, five hundred seventy-eight".