681345258 has 32 divisors (see below), whose sum is σ = 1492136640. Its totient is φ = 205695360.

The previous prime is 681345253. The next prime is 681345289. The reversal of 681345258 is 852543186.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681345253) 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, 1435 + ... + 36942.

It is an arithmetic number, because the mean of its divisors is an integer number (46629270).

Almost surely, 2^681345258 is an apocalyptic number.

681345258 is an abundant number, since it is smaller than the sum of its proper divisors (810791382).

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

681345258 is a wasteful number, since it uses less digits than its factorization.

681345258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38662.

The product of its digits is 230400, while the sum is 42.

The square root of 681345258 is about 26102.5910208163. The cubic root of 681345258 is about 879.9454416933.

The spelling of 681345258 in words is "six hundred eighty-one million, three hundred forty-five thousand, two hundred fifty-eight".