681562741348 has 6 divisors (see below), whose sum is σ = 1192734797366. Its totient is φ = 340781370672.

The previous prime is 681562741339. The next prime is 681562741369. The reversal of 681562741348 is 843147265186.

It can be written as a sum of positive squares in only one way, i.e., 542002219264 + 139560522084 = 736208^2 + 373578^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85195342665 + ... + 85195342672.

Almost surely, 2^681562741348 is an apocalyptic number.

It is an amenable number.

681562741348 is a deficient number, since it is larger than the sum of its proper divisors (511172056018).

681562741348 is a wasteful number, since it uses less digits than its factorization.

681562741348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170390685341 (or 170390685339 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 55.

The spelling of 681562741348 in words is "six hundred eighty-one billion, five hundred sixty-two million, seven hundred forty-one thousand, three hundred forty-eight".