681004957249 has 16 divisors (see below), whose sum is σ = 729935136000. Its totient is φ = 633478943376.

The previous prime is 681004957201. The next prime is 681004957289. The reversal of 681004957249 is 942759400186.

It is a cyclic number.

It is not a de Polignac number, because 681004957249 - 2⁷ = 681004957121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681004957249.

It is not an unprimeable number, because it can be changed into a prime (681004957289) 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, 1067599 + ... + 1581700.

It is an arithmetic number, because the mean of its divisors is an integer number (45620946000).

Almost surely, 2^681004957249 is an apocalyptic number.

It is an amenable number.

681004957249 is a deficient number, since it is larger than the sum of its proper divisors (48930178751).

681004957249 is a wasteful number, since it uses less digits than its factorization.

681004957249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649564.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 681004957249 in words is "six hundred eighty-one billion, four million, nine hundred fifty-seven thousand, two hundred forty-nine".