680454844 has 6 divisors (see below), whose sum is σ = 1190795984. Its totient is φ = 340227420.

The previous prime is 680454823. The next prime is 680454851. The reversal of 680454844 is 448454086.

It is a self number, because there is not a number n which added to its sum of digits gives 680454844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85056852 + ... + 85056859.

Almost surely, 2^680454844 is an apocalyptic number.

It is an amenable number.

680454844 is a deficient number, since it is larger than the sum of its proper divisors (510341140).

680454844 is a wasteful number, since it uses less digits than its factorization.

680454844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170113715 (or 170113713 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 43.

The square root of 680454844 is about 26085.5293984999. The cubic root of 680454844 is about 879.5619565752.

The spelling of 680454844 in words is "six hundred eighty million, four hundred fifty-four thousand, eight hundred forty-four".