16281445747 has 12 divisors (see below), whose sum is σ = 18944330760. Its totient is φ = 13952069376.

The previous prime is 16281445699. The next prime is 16281445757. The reversal of 16281445747 is 74754418261.

It is a de Polignac number, because none of the positive numbers 2^k-16281445747 is a prime.

It is a super-2 number, since 2×16281445747² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 16281445747.

It is not an unprimeable number, because it can be changed into a prime (16281445757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169683 + ... + 247699.

It is an arithmetic number, because the mean of its divisors is an integer number (1578694230).

Almost surely, 2^16281445747 is an apocalyptic number.

16281445747 is a deficient number, since it is larger than the sum of its proper divisors (2662885013).

16281445747 is an equidigital number, since it uses as much as digits as its factorization.

16281445747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82290 (or 82283 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 49.

The spelling of 16281445747 in words is "sixteen billion, two hundred eighty-one million, four hundred forty-five thousand, seven hundred forty-seven".