681165255 has 32 divisors (see below), whose sum is σ = 1106703360. Its totient is φ = 357701760.

The previous prime is 681165241. The next prime is 681165293. The reversal of 681165255 is 552561186.

It is not a de Polignac number, because 681165255 - 2¹¹ = 681163207 is a prime.

It is a super-2 number, since 2×681165255² = 927972209238430050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666645 + ... + 667665.

It is an arithmetic number, because the mean of its divisors is an integer number (34584480).

Almost surely, 2^681165255 is an apocalyptic number.

681165255 is a deficient number, since it is larger than the sum of its proper divisors (425538105).

681165255 is a wasteful number, since it uses less digits than its factorization.

681165255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its digits is 72000, while the sum is 39.

The square root of 681165255 is about 26099.1428020155. The cubic root of 681165255 is about 879.8679446300.

The spelling of 681165255 in words is "six hundred eighty-one million, one hundred sixty-five thousand, two hundred fifty-five".