681322909742 has 8 divisors (see below), whose sum is σ = 1021999834632. Its totient is φ = 340656298200.

The previous prime is 681322909741. The next prime is 681322909793. The reversal of 681322909742 is 247909223186.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681322909741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2411009 + ... + 2678732.

It is an arithmetic number, because the mean of its divisors is an integer number (127749979329).

Almost surely, 2^681322909742 is an apocalyptic number.

681322909742 is a deficient number, since it is larger than the sum of its proper divisors (340676924890).

681322909742 is a wasteful number, since it uses less digits than its factorization.

681322909742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5156674.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 681322909742 in words is "six hundred eighty-one billion, three hundred twenty-two million, nine hundred nine thousand, seven hundred forty-two".