219850661382 has 64 divisors (see below), whose sum is σ = 508830501888. Its totient is φ = 62586432000.

The previous prime is 219850661377. The next prime is 219850661449. The reversal of 219850661382 is 283166058912.

It is a super-2 number, since 2×219850661382² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425907 + ... + 788097.

It is an arithmetic number, because the mean of its divisors is an integer number (7950476592).

Almost surely, 2^219850661382 is an apocalyptic number.

219850661382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 219850661382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254415250944).

219850661382 is an abundant number, since it is smaller than the sum of its proper divisors (288979840506).

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

219850661382 is a wasteful number, since it uses less digits than its factorization.

219850661382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362765.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 219850661382 in words is "two hundred nineteen billion, eight hundred fifty million, six hundred sixty-one thousand, three hundred eighty-two".