16279220835 has 20 divisors (see below), whose sum is σ = 29182011408. Its totient is φ = 8682250896.

The previous prime is 16279220831. The next prime is 16279220851. The reversal of 16279220835 is 53802297261.

It is not a de Polignac number, because 16279220835 - 2² = 16279220831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16279220831) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20097399 + ... + 20098208.

Almost surely, 2^16279220835 is an apocalyptic number.

16279220835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16279220835 is a deficient number, since it is larger than the sum of its proper divisors (12902790573).

16279220835 is an equidigital number, since it uses as much as digits as its factorization.

16279220835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40195624 (or 40195615 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 16279220835 in words is "sixteen billion, two hundred seventy-nine million, two hundred twenty thousand, eight hundred thirty-five".