32215849778 has 18 divisors (see below), whose sum is σ = 56216471103. Its totient is φ = 13806031260.

The previous prime is 32215849777. The next prime is 32215849837. The reversal of 32215849778 is 87794851223.

It can be written as a sum of positive squares in only one way, i.e., 16107924889 + 16107924889 = 126917^2 + 126917^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=126917.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32215849777) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 1767773 + ... + 1785903.

Almost surely, 2^32215849778 is an apocalyptic number.

32215849778 is a deficient number, since it is larger than the sum of its proper divisors (24000621325).

32215849778 is an frugal number, since it uses more digits than its factorization.

32215849778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36278 (or 18140 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 56.

The spelling of 32215849778 in words is "thirty-two billion, two hundred fifteen million, eight hundred forty-nine thousand, seven hundred seventy-eight".