67781437814 has 16 divisors (see below), whose sum is σ = 105185692800. Its totient is φ = 32724410880.

The previous prime is 67781437723. The next prime is 67781437847. The reversal of 67781437814 is 41873418776.

It is a self number, because there is not a number n which added to its sum of digits gives 67781437814.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189589 + ... + 1245264.

It is an arithmetic number, because the mean of its divisors is an integer number (6574105800).

Almost surely, 2^67781437814 is an apocalyptic number.

67781437814 is a deficient number, since it is larger than the sum of its proper divisors (37404254986).

67781437814 is a wasteful number, since it uses less digits than its factorization.

67781437814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435335.

The product of its digits is 6322176, while the sum is 56.

The spelling of 67781437814 in words is "sixty-seven billion, seven hundred eighty-one million, four hundred thirty-seven thousand, eight hundred fourteen".