219906468977 has 16 divisors (see below), whose sum is σ = 249386981760. Its totient is φ = 192229500672.

The previous prime is 219906468937. The next prime is 219906468979. The reversal of 219906468977 is 779864609912.

It is a cyclic number.

It is not a de Polignac number, because 219906468977 - 2¹⁸ = 219906206833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219906468979) 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, 440393 + ... + 796089.

It is an arithmetic number, because the mean of its divisors is an integer number (15586686360).

Almost surely, 2^219906468977 is an apocalyptic number.

It is an amenable number.

219906468977 is a deficient number, since it is larger than the sum of its proper divisors (29480512783).

219906468977 is a wasteful number, since it uses less digits than its factorization.

219906468977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358232.

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 219906468977 in words is "two hundred nineteen billion, nine hundred six million, four hundred sixty-eight thousand, nine hundred seventy-seven".