16645346331 has 16 divisors (see below), whose sum is σ = 22285027104. Its totient is φ = 11051322624.

The previous prime is 16645346329. The next prime is 16645346351. The reversal of 16645346331 is 13364354661.

It is not a de Polignac number, because 16645346331 - 2¹ = 16645346329 is a prime.

It is a super-2 number, since 2×16645346331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16645346351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2304081 + ... + 2311293.

It is an arithmetic number, because the mean of its divisors is an integer number (1392814194).

Almost surely, 2^16645346331 is an apocalyptic number.

16645346331 is a deficient number, since it is larger than the sum of its proper divisors (5639680773).

16645346331 is a wasteful number, since it uses less digits than its factorization.

16645346331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10270.

The product of its digits is 466560, while the sum is 42.

The spelling of 16645346331 in words is "sixteen billion, six hundred forty-five million, three hundred forty-six thousand, three hundred thirty-one".