681594705 has 48 divisors (see below), whose sum is σ = 1316300544. Its totient is φ = 323427840.

The previous prime is 681594679. The next prime is 681594709. The reversal of 681594705 is 507495186.

It is not a de Polignac number, because 681594705 - 2⁷ = 681594577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (681594709) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8617 + ... + 37913.

It is an arithmetic number, because the mean of its divisors is an integer number (27422928).

Almost surely, 2^681594705 is an apocalyptic number.

It is an amenable number.

681594705 is a deficient number, since it is larger than the sum of its proper divisors (634705839).

681594705 is a wasteful number, since it uses less digits than its factorization.

681594705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29366 (or 29363 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 681594705 is about 26107.3687873750. The cubic root of 681594705 is about 880.0528140651.

The spelling of 681594705 in words is "six hundred eighty-one million, five hundred ninety-four thousand, seven hundred five".