16044961385 has 16 divisors (see below), whose sum is σ = 19996534800. Its totient is φ = 12348711936.

The previous prime is 16044961367. The next prime is 16044961397. The reversal of 16044961385 is 58316944061.

It can be written as a sum of positive squares in 8 ways, for example, as 465178624 + 15579782761 = 21568^2 + 124819^2 .

It is a cyclic number.

It is not a de Polignac number, because 16044961385 - 2²⁶ = 15977852521 is a prime.

It is a super-2 number, since 2×16044961385² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470780 + ... + 503709.

It is an arithmetic number, because the mean of its divisors is an integer number (1249783425).

Almost surely, 2^16044961385 is an apocalyptic number.

It is an amenable number.

16044961385 is a deficient number, since it is larger than the sum of its proper divisors (3951573415).

16044961385 is an equidigital number, since it uses as much as digits as its factorization.

16044961385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974620.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 16044961385 in words is "sixteen billion, forty-four million, nine hundred sixty-one thousand, three hundred eighty-five".