680610636 has 18 divisors (see below), whose sum is σ = 1720432532. Its totient is φ = 226870200.

The previous prime is 680610583. The next prime is 680610649. The reversal of 680610636 is 636016086.

680610636 is a `hidden beast` number, since 6 + 8 + 0 + 6 + 10 + 636 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 18905851 = 680610636 / (6 + 8 + 0 + 6 + 1 + 0 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 680610636.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9452890 + ... + 9452961.

Almost surely, 2^680610636 is an apocalyptic number.

It is an amenable number.

680610636 is an abundant number, since it is smaller than the sum of its proper divisors (1039821896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

680610636 is a wasteful number, since it uses less digits than its factorization.

680610636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18905861 (or 18905856 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 680610636 is about 26088.5154042924. The cubic root of 680610636 is about 879.6290774925.

The spelling of 680610636 in words is "six hundred eighty million, six hundred ten thousand, six hundred thirty-six".