67421973936 has 40 divisors (see below), whose sum is σ = 183340457920. Its totient is φ = 21291149376.

The previous prime is 67421973929. The next prime is 67421973959. The reversal of 67421973936 is 63937912476.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36962890 + ... + 36964713.

It is an arithmetic number, because the mean of its divisors is an integer number (4583511448).

Almost surely, 2^67421973936 is an apocalyptic number.

It is an amenable number.

67421973936 is an abundant number, since it is smaller than the sum of its proper divisors (115918483984).

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

67421973936 is a wasteful number, since it uses less digits than its factorization.

67421973936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73927633 (or 73927627 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 57.

The spelling of 67421973936 in words is "sixty-seven billion, four hundred twenty-one million, nine hundred seventy-three thousand, nine hundred thirty-six".