221683878995904 has 84 divisors (see below), whose sum is σ = 684295029284776. Its totient is φ = 68210424304128.

The previous prime is 221683878995879. The next prime is 221683878995911. The reversal of 221683878995904 is 409599878386122.

221683878995904 is a `hidden beast` number, since 2 + 2 + 1 + 68 + 387 + 8 + 9 + 95 + 90 + 4 = 666.

221683878995904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14802601954 + ... + 14802616929.

It is a 1-persistent number, because it is pandigital, but 2⋅221683878995904 = 443367757991808 is not.

Almost surely, 2^{221683878995904} is an apocalyptic number.

221683878995904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221683878995904 is an abundant number, since it is smaller than the sum of its proper divisors (462611150288872).

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

221683878995904 is a wasteful number, since it uses less digits than its factorization.

221683878995904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29605218914 (or 29605218901 counting only the distinct ones).

The product of its (nonzero) digits is 3762339840, while the sum is 81.

The spelling of 221683878995904 in words is "two hundred twenty-one trillion, six hundred eighty-three billion, eight hundred seventy-eight million, nine hundred ninety-five thousand, nine hundred four".