16196803581 has 16 divisors (see below), whose sum is σ = 24683638784. Its totient is φ = 9254268144.

The previous prime is 16196803577. The next prime is 16196803583. The reversal of 16196803581 is 18530869161.

It is not a de Polignac number, because 16196803581 - 2² = 16196803577 is a prime.

It is a super-2 number, since 2×16196803581² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16196803581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16196803583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170616 + ... + 247998.

It is an arithmetic number, because the mean of its divisors is an integer number (1542727424).

Almost surely, 2^16196803581 is an apocalyptic number.

It is an amenable number.

16196803581 is a deficient number, since it is larger than the sum of its proper divisors (8486835203).

16196803581 is an equidigital number, since it uses as much as digits as its factorization.

16196803581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87360.

The product of its (nonzero) digits is 311040, while the sum is 48.

It can be divided in two parts, 1619680 and 3581, that added together give a palindrome (1623261).

The spelling of 16196803581 in words is "sixteen billion, one hundred ninety-six million, eight hundred three thousand, five hundred eighty-one".