16645464012401 has 16 divisors (see below), whose sum is σ = 19681543248000. Its totient is φ = 13774032574848.

The previous prime is 16645464012391. The next prime is 16645464012431. The reversal of 16645464012401 is 10421046454661.

It is not a de Polignac number, because 16645464012401 - 2³⁸ = 16370586105457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16645464012431) 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, 2693795 + ... + 6367688.

It is an arithmetic number, because the mean of its divisors is an integer number (1230096453000).

Almost surely, 2^{16645464012401} is an apocalyptic number.

It is an amenable number.

16645464012401 is a deficient number, since it is larger than the sum of its proper divisors (3036079235599).

16645464012401 is an equidigital number, since it uses as much as digits as its factorization.

16645464012401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9070568.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 16645464012401 in words is "sixteen trillion, six hundred forty-five billion, four hundred sixty-four million, twelve thousand, four hundred one".