16210891684 has 81 divisors (see below), whose sum is σ = 31629674433. Its totient is φ = 7266521184.

The previous prime is 16210891681. The next prime is 16210891691. The reversal of 16210891684 is 48619801261.

The square root of 16210891684 is 127322.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2398060900 + 13812830784 = 48970^2 + 117528^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16210891681) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 195311907 + ... + 195311989.

Almost surely, 2^16210891684 is an apocalyptic number.

16210891684 is the 127322-nd square number.

It is an amenable number.

16210891684 is a deficient number, since it is larger than the sum of its proper divisors (15418782749).

16210891684 is an equidigital number, since it uses as much as digits as its factorization.

16210891684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 16210891684 in words is "sixteen billion, two hundred ten million, eight hundred ninety-one thousand, six hundred eighty-four".