681204536 has 16 divisors (see below), whose sum is σ = 1279371840. Its totient is φ = 340038720.

The previous prime is 681204533. The next prime is 681204539. The reversal of 681204536 is 635402186.

It is an interprime number because it is at equal distance from previous prime (681204533) and next prime (681204539).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 681204496 and 681204505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681204533) 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, 65285 + ... + 74996.

It is an arithmetic number, because the mean of its divisors is an integer number (79960740).

Almost surely, 2^681204536 is an apocalyptic number.

It is an amenable number.

681204536 is a deficient number, since it is larger than the sum of its proper divisors (598167304).

681204536 is a wasteful number, since it uses less digits than its factorization.

681204536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140894 (or 140890 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 681204536 is about 26099.8953254606. The cubic root of 681204536 is about 879.8848575245.

The spelling of 681204536 in words is "six hundred eighty-one million, two hundred four thousand, five hundred thirty-six".