16044564845 has 16 divisors (see below), whose sum is σ = 19904364480. Its totient is φ = 12407883264.

The previous prime is 16044564841. The next prime is 16044564847. The reversal of 16044564845 is 54846544061.

It is a cyclic number.

It is not a de Polignac number, because 16044564845 - 2² = 16044564841 is a prime.

It is a super-2 number, since 2×16044564845² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16044564845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16044564841) 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, 363815 + ... + 405524.

It is an arithmetic number, because the mean of its divisors is an integer number (1244022780).

Almost surely, 2^16044564845 is an apocalyptic number.

It is an amenable number.

16044564845 is a deficient number, since it is larger than the sum of its proper divisors (3859799635).

16044564845 is an equidigital number, since it uses as much as digits as its factorization.

16044564845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769484.

The product of its (nonzero) digits is 1843200, while the sum is 47.

The spelling of 16044564845 in words is "sixteen billion, forty-four million, five hundred sixty-four thousand, eight hundred forty-five".