681124705 has 16 divisors (see below), whose sum is σ = 835743744. Its totient is φ = 532665280.

The previous prime is 681124651. The next prime is 681124739. The reversal of 681124705 is 507421186.

It is not a de Polignac number, because 681124705 - 2¹⁵ = 681091937 is a prime.

It is a super-2 number, since 2×681124705² = 927861727522674050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321600 + ... + 323710.

It is an arithmetic number, because the mean of its divisors is an integer number (52233984).

Almost surely, 2^681124705 is an apocalyptic number.

It is an amenable number.

681124705 is a deficient number, since it is larger than the sum of its proper divisors (154619039).

681124705 is a wasteful number, since it uses less digits than its factorization.

681124705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 681124705 is about 26098.3659450166. The cubic root of 681124705 is about 879.8504846705.

The spelling of 681124705 in words is "six hundred eighty-one million, one hundred twenty-four thousand, seven hundred five".