681067588546 has 4 divisors (see below), whose sum is σ = 1021601382822. Its totient is φ = 340533794272.

The previous prime is 681067588529. The next prime is 681067588571. The reversal of 681067588546 is 645885760186.

681067588546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 379715996521 + 301351592025 = 616211^2 + 548955^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170266897135 + ... + 170266897138.

Almost surely, 2^681067588546 is an apocalyptic number.

681067588546 is a deficient number, since it is larger than the sum of its proper divisors (340533794276).

681067588546 is a wasteful number, since it uses less digits than its factorization.

681067588546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340533794275.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 681067588546 in words is "six hundred eighty-one billion, sixty-seven million, five hundred eighty-eight thousand, five hundred forty-six".