67781482021320 has 64 divisors (see below), whose sum is σ = 203348705584320. Its totient is φ = 18074683248384.

The previous prime is 67781482021219. The next prime is 67781482021361. The reversal of 67781482021320 is 2312028418776.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140074 + ... + 11643993.

It is an arithmetic number, because the mean of its divisors is an integer number (3177323524755).

Almost surely, 2^{67781482021320} is an apocalyptic number.

67781482021320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67781482021320 is an abundant number, since it is smaller than the sum of its proper divisors (135567223563000).

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

67781482021320 is a wasteful number, since it uses less digits than its factorization.

67781482021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11832014 (or 11832010 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 51.

The spelling of 67781482021320 in words is "sixty-seven trillion, seven hundred eighty-one billion, four hundred eighty-two million, twenty-one thousand, three hundred twenty".