1641353216 has 26 divisors (see below), whose sum is σ = 3282313902. Its totient is φ = 820674560.

The previous prime is 1641353177. The next prime is 1641353261. The reversal of 1641353216 is 6123531461.

It can be written as a sum of positive squares in only one way, i.e., 1107558400 + 533794816 = 33280^2 + 23104^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196265 + ... + 204456.

Almost surely, 2^1641353216 is an apocalyptic number.

1641353216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1641353216 is a deficient number, since it is larger than the sum of its proper divisors (1640960686).

1641353216 is an frugal number, since it uses more digits than its factorization.

1641353216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400745 (or 400723 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 1641353216 is about 40513.6176612260. The cubic root of 1641353216 is about 1179.5979708666.

Adding to 1641353216 its reverse (6123531461), we get a palindrome (7764884677).

The spelling of 1641353216 in words is "one billion, six hundred forty-one million, three hundred fifty-three thousand, two hundred sixteen".