67221438536 has 16 divisors (see below), whose sum is σ = 144045939840. Its totient is φ = 28809187920.

The previous prime is 67221438509. The next prime is 67221438547. The reversal of 67221438536 is 63583412276.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600191360 + ... + 600191471.

It is an arithmetic number, because the mean of its divisors is an integer number (9002871240).

Almost surely, 2^67221438536 is an apocalyptic number.

It is an amenable number.

67221438536 is an abundant number, since it is smaller than the sum of its proper divisors (76824501304).

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

67221438536 is a wasteful number, since it uses less digits than its factorization.

67221438536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200382844 (or 1200382840 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The spelling of 67221438536 in words is "sixty-seven billion, two hundred twenty-one million, four hundred thirty-eight thousand, five hundred thirty-six".