16840657344945 has 32 divisors (see below), whose sum is σ = 30851266118400. Its totient is φ = 7684355900160.

The previous prime is 16840657344839. The next prime is 16840657344949. The reversal of 16840657344945 is 54944375604861.

It is not a de Polignac number, because 16840657344945 - 2¹² = 16840657340849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16840657344949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148175370 + ... + 148288979.

It is an arithmetic number, because the mean of its divisors is an integer number (964102066200).

Almost surely, 2^{16840657344945} is an apocalyptic number.

16840657344945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16840657344945 is a deficient number, since it is larger than the sum of its proper divisors (14010608773455).

16840657344945 is a wasteful number, since it uses less digits than its factorization.

16840657344945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296464905.

The product of its (nonzero) digits is 348364800, while the sum is 66.

The spelling of 16840657344945 in words is "sixteen trillion, eight hundred forty billion, six hundred fifty-seven million, three hundred forty-four thousand, nine hundred forty-five".