67781808470045 has 32 divisors (see below), whose sum is σ = 83052298038528. Its totient is φ = 53092546011648.

The previous prime is 67781808470041. The next prime is 67781808470071. The reversal of 67781808470045 is 54007480818776.

It is a cyclic number.

It is not a de Polignac number, because 67781808470045 - 2² = 67781808470041 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67781808470041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1021130897 + ... + 1021197273.

It is an arithmetic number, because the mean of its divisors is an integer number (2595384313704).

Almost surely, 2^{67781808470045} is an apocalyptic number.

It is an amenable number.

67781808470045 is a deficient number, since it is larger than the sum of its proper divisors (15270489568483).

67781808470045 is a wasteful number, since it uses less digits than its factorization.

67781808470045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84869.

The product of its (nonzero) digits is 84295680, while the sum is 65.

The spelling of 67781808470045 in words is "sixty-seven trillion, seven hundred eighty-one billion, eight hundred eight million, four hundred seventy thousand, forty-five".