67212782181 has 16 divisors (see below), whose sum is σ = 99655038400. Its totient is φ = 44772275664.

The previous prime is 67212782179. The next prime is 67212782227. The reversal of 67212782181 is 18128721276.

It is not a de Polignac number, because 67212782181 - 2¹ = 67212782179 is a prime.

It is a super-2 number, since 2×67212782181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67212782141) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 972811 + ... + 1039608.

It is an arithmetic number, because the mean of its divisors is an integer number (6228439900).

Almost surely, 2^67212782181 is an apocalyptic number.

It is an amenable number.

67212782181 is a deficient number, since it is larger than the sum of its proper divisors (32442256219).

67212782181 is a wasteful number, since it uses less digits than its factorization.

67212782181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013665 (or 2013659 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The spelling of 67212782181 in words is "sixty-seven billion, two hundred twelve million, seven hundred eighty-two thousand, one hundred eighty-one".