219381439770 has 32 divisors (see below), whose sum is σ = 585017173440. Its totient is φ = 58501717200.

The previous prime is 219381439769. The next prime is 219381439801. The reversal of 219381439770 is 77934183912.

219381439770 is a `hidden beast` number, since 21 + 93 + 81 + 4 + 397 + 70 = 666.

It is a super-2 number, since 2×219381439770² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 406261656 + ... + 406262195.

It is an arithmetic number, because the mean of its divisors is an integer number (18281786670).

Almost surely, 2^219381439770 is an apocalyptic number.

219381439770 is an abundant number, since it is smaller than the sum of its proper divisors (365635733670).

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

219381439770 is a wasteful number, since it uses less digits than its factorization.

219381439770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812523867 (or 812523861 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 219381439770 in words is "two hundred nineteen billion, three hundred eighty-one million, four hundred thirty-nine thousand, seven hundred seventy".