1641770217234 has 112 divisors (see below), whose sum is σ = 4236190570368. Its totient is φ = 467251255296.

The previous prime is 1641770217233. The next prime is 1641770217289. The reversal of 1641770217234 is 4327120771461.

1641770217234 is a `hidden beast` number, since 16 + 417 + 7 + 0 + 217 + 2 + 3 + 4 = 666.

It is a super-2 number, since 2×1641770217234² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1641770217234.

It is not an unprimeable number, because it can be changed into a prime (1641770217233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2309979 + ... + 2935905.

Almost surely, 2^{1641770217234} is an apocalyptic number.

1641770217234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641770217234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2118095285184).

1641770217234 is an abundant number, since it is smaller than the sum of its proper divisors (2594420353134).

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

1641770217234 is an equidigital number, since it uses as much as digits as its factorization.

1641770217234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626211 (or 626196 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

Adding to 1641770217234 its reverse (4327120771461), we get a palindrome (5968890988695).

The spelling of 1641770217234 in words is "one trillion, six hundred forty-one billion, seven hundred seventy million, two hundred seventeen thousand, two hundred thirty-four".