16280740243 has 4 divisors (see below), whose sum is σ = 16281257760. Its totient is φ = 16280222728.

The previous prime is 16280740193. The next prime is 16280740249. The reversal of 16280740243 is 34204708261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34204708261 = 2953 ⋅11583037.

It is a cyclic number.

It is not a de Polignac number, because 16280740243 - 2⁹ = 16280739731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16280740249) 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, 208288 + ... + 275581.

It is an arithmetic number, because the mean of its divisors is an integer number (4070314440).

Almost surely, 2^16280740243 is an apocalyptic number.

16280740243 is a deficient number, since it is larger than the sum of its proper divisors (517517).

16280740243 is an equidigital number, since it uses as much as digits as its factorization.

16280740243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517516.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 16280740243 in words is "sixteen billion, two hundred eighty million, seven hundred forty thousand, two hundred forty-three".