681440068094 has 4 divisors (see below), whose sum is σ = 1022160102144. Its totient is φ = 340720034046.

The previous prime is 681440068093. The next prime is 681440068103. The reversal of 681440068094 is 490860044186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681440068093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170360017022 + ... + 170360017025.

It is an arithmetic number, because the mean of its divisors is an integer number (255540025536).

Almost surely, 2^681440068094 is an apocalyptic number.

681440068094 is a deficient number, since it is larger than the sum of its proper divisors (340720034050).

681440068094 is a wasteful number, since it uses less digits than its factorization.

681440068094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340720034049.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 681440068094 in words is "six hundred eighty-one billion, four hundred forty million, sixty-eight thousand, ninety-four".