67643219204238 has 32 divisors (see below), whose sum is σ = 142892807299200. Its totient is φ = 21288112086816.

The previous prime is 67643219204233. The next prime is 67643219204303. The reversal of 67643219204238 is 83240291234676.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67643219204233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012529008 + ... + 1012595811.

It is an arithmetic number, because the mean of its divisors is an integer number (4465400228100).

Almost surely, 2^{67643219204238} is an apocalyptic number.

67643219204238 is an abundant number, since it is smaller than the sum of its proper divisors (75249588094962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67643219204238 is a wasteful number, since it uses less digits than its factorization.

67643219204238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025125136.

The product of its (nonzero) digits is 20901888, while the sum is 57.

The spelling of 67643219204238 in words is "sixty-seven trillion, six hundred forty-three billion, two hundred nineteen million, two hundred four thousand, two hundred thirty-eight".