16646436514 has 4 divisors (see below), whose sum is σ = 24969654774. Its totient is φ = 8323218256.

The previous prime is 16646436497. The next prime is 16646436529. The reversal of 16646436514 is 41563464661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16388352289 + 258084225 = 128017^2 + 16065^2 .

It is a super-2 number, since 2×16646436514² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161609127 + ... + 4161609130.

Almost surely, 2^16646436514 is an apocalyptic number.

16646436514 is a deficient number, since it is larger than the sum of its proper divisors (8323218260).

16646436514 is an equidigital number, since it uses as much as digits as its factorization.

16646436514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8323218259.

The product of its digits is 1244160, while the sum is 46.

The spelling of 16646436514 in words is "sixteen billion, six hundred forty-six million, four hundred thirty-six thousand, five hundred fourteen".