16044371993 has 16 divisors (see below), whose sum is σ = 18034724736. Its totient is φ = 14162396160.

The previous prime is 16044371983. The next prime is 16044372023. The reversal of 16044371993 is 39917344061.

It is a cyclic number.

It is not a de Polignac number, because 16044371993 - 2²² = 16040177689 is a prime.

It is a super-3 number, since 3×16044371993³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16044371953) 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, 2082278 + ... + 2089968.

It is an arithmetic number, because the mean of its divisors is an integer number (1127170296).

Almost surely, 2^16044371993 is an apocalyptic number.

16044371993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16044371993 is a deficient number, since it is larger than the sum of its proper divisors (1990352743).

16044371993 is a wasteful number, since it uses less digits than its factorization.

16044371993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14704.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 16044371993 in words is "sixteen billion, forty-four million, three hundred seventy-one thousand, nine hundred ninety-three".