681603474152 has 16 divisors (see below), whose sum is σ = 1278119096100. Its totient is φ = 340771715200.

The previous prime is 681603474151. The next prime is 681603474173. The reversal of 681603474152 is 251474306186.

It can be written as a sum of positive squares in 2 ways, for example, as 654620155396 + 26983318756 = 809086^2 + 164266^2 .

It is a super-2 number, since 2×681603474152² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681603474097 and 681603474106.

It is not an unprimeable number, because it can be changed into a prime (681603474151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3656099 + ... + 3838002.

Almost surely, 2^681603474152 is an apocalyptic number.

It is an amenable number.

681603474152 is a deficient number, since it is larger than the sum of its proper divisors (596515621948).

681603474152 is a wasteful number, since it uses less digits than its factorization.

681603474152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505476 (or 7505472 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 681603474152 in words is "six hundred eighty-one billion, six hundred three million, four hundred seventy-four thousand, one hundred fifty-two".