681408875562 has 32 divisors (see below), whose sum is σ = 1414793234880. Its totient is φ = 218529064320.

The previous prime is 681408875557. The next prime is 681408875621. The reversal of 681408875562 is 265578804186.

It is a junction number, because it is equal to n+sod(n) for n = 681408875496 and 681408875505.

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, 6869739 + ... + 6968222.

It is an arithmetic number, because the mean of its divisors is an integer number (44212288590).

Almost surely, 2^681408875562 is an apocalyptic number.

681408875562 is an abundant number, since it is smaller than the sum of its proper divisors (733384359318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681408875562 is a wasteful number, since it uses less digits than its factorization.

681408875562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13838278.

The product of its (nonzero) digits is 25804800, while the sum is 60.

The spelling of 681408875562 in words is "six hundred eighty-one billion, four hundred eight million, eight hundred seventy-five thousand, five hundred sixty-two".