16115243663 has 4 divisors (see below), whose sum is σ = 16116047928. Its totient is φ = 16114439400.

The previous prime is 16115243633. The next prime is 16115243689. The reversal of 16115243663 is 36634251161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16115243663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16115243603) 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, 371288 + ... + 412413.

It is an arithmetic number, because the mean of its divisors is an integer number (4029011982).

Almost surely, 2^16115243663 is an apocalyptic number.

16115243663 is a deficient number, since it is larger than the sum of its proper divisors (804265).

16115243663 is an equidigital number, since it uses as much as digits as its factorization.

16115243663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804264.

The product of its digits is 77760, while the sum is 38.

The spelling of 16115243663 in words is "sixteen billion, one hundred fifteen million, two hundred forty-three thousand, six hundred sixty-three".