680461538 has 8 divisors (see below), whose sum is σ = 1021011420. Its totient is φ = 340124400.

The previous prime is 680461517. The next prime is 680461547. The reversal of 680461538 is 835164086.

It can be written as a sum of positive squares in 2 ways, for example, as 679279969 + 1181569 = 26063^2 + 1087^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 680461495 and 680461504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44933 + ... + 58136.

Almost surely, 2^680461538 is an apocalyptic number.

680461538 is a deficient number, since it is larger than the sum of its proper divisors (340549882).

680461538 is a wasteful number, since it uses less digits than its factorization.

680461538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106372.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 680461538 is about 26085.6577068703. The cubic root of 680461538 is about 879.5648408069.

The spelling of 680461538 in words is "six hundred eighty million, four hundred sixty-one thousand, five hundred thirty-eight".