680444351 has 16 divisors (see below), whose sum is σ = 719933184. Its totient is φ = 641841024.

The previous prime is 680444309. The next prime is 680444353. The reversal of 680444351 is 153444086.

It is a cyclic number.

It is not a de Polignac number, because 680444351 - 2¹⁸ = 680182207 is a prime.

It is a super-2 number, since 2×680444351² = 926009029615622402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680444353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695975 + ... + 696951.

It is an arithmetic number, because the mean of its divisors is an integer number (44995824).

Almost surely, 2^680444351 is an apocalyptic number.

680444351 is a deficient number, since it is larger than the sum of its proper divisors (39488833).

680444351 is a wasteful number, since it uses less digits than its factorization.

680444351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 680444351 is about 26085.3282708882. The cubic root of 680444351 is about 879.5574354370.

The spelling of 680444351 in words is "six hundred eighty million, four hundred forty-four thousand, three hundred fifty-one".