681937625570 has 8 divisors (see below), whose sum is σ = 1227487726044. Its totient is φ = 272775050224.

The previous prime is 681937625531. The next prime is 681937625591. The reversal of 681937625570 is 75526739186.

It is a happy number.

681937625570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 656049780961 + 25887844609 = 809969^2 + 160897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34096881269 + ... + 34096881288.

Almost surely, 2^681937625570 is an apocalyptic number.

681937625570 is a deficient number, since it is larger than the sum of its proper divisors (545550100474).

681937625570 is a wasteful number, since it uses less digits than its factorization.

681937625570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68193762564.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 681937625570 in words is "six hundred eighty-one billion, nine hundred thirty-seven million, six hundred twenty-five thousand, five hundred seventy".