16045663993 has 4 divisors (see below), whose sum is σ = 16047283840. Its totient is φ = 16044044148.

The previous prime is 16045663969. The next prime is 16045664017. The reversal of 16045663993 is 39936654061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39936654061 = 127 ⋅314461843.

It is an interprime number because it is at equal distance from previous prime (16045663969) and next prime (16045664017).

It is a cyclic number.

It is not a de Polignac number, because 16045663993 - 2⁹ = 16045663481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16045663993.

It is not an unprimeable number, because it can be changed into a prime (16045663093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794973 + ... + 814906.

It is an arithmetic number, because the mean of its divisors is an integer number (4011820960).

Almost surely, 2^16045663993 is an apocalyptic number.

It is an amenable number.

16045663993 is a deficient number, since it is larger than the sum of its proper divisors (1619847).

16045663993 is an equidigital number, since it uses as much as digits as its factorization.

16045663993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619846.

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 16045663993 in words is "sixteen billion, forty-five million, six hundred sixty-three thousand, nine hundred ninety-three".