16253758663 has 4 divisors (see below), whose sum is σ = 16278881040. Its totient is φ = 16228636288.

The previous prime is 16253758649. The next prime is 16253758679. The reversal of 16253758663 is 36685735261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16253758663 - 2³³ = 7663824071 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 16253758663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16253758613) 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, 12560218 + ... + 12561511.

It is an arithmetic number, because the mean of its divisors is an integer number (4069720260).

Almost surely, 2^16253758663 is an apocalyptic number.

16253758663 is a deficient number, since it is larger than the sum of its proper divisors (25122377).

16253758663 is an equidigital number, since it uses as much as digits as its factorization.

16253758663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25122376.

The product of its digits is 5443200, while the sum is 52.

The spelling of 16253758663 in words is "sixteen billion, two hundred fifty-three million, seven hundred fifty-eight thousand, six hundred sixty-three".