16540719243 has 4 divisors (see below), whose sum is σ = 22054292328. Its totient is φ = 11027146160.

The previous prime is 16540719187. The next prime is 16540719253. The reversal of 16540719243 is 34291704561.

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 16540719243 - 2²⁸ = 16272283787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16540719195 and 16540719204.

It is not an unprimeable number, because it can be changed into a prime (16540719253) 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, 2756786538 + ... + 2756786543.

It is an arithmetic number, because the mean of its divisors is an integer number (5513573082).

Almost surely, 2^16540719243 is an apocalyptic number.

16540719243 is a deficient number, since it is larger than the sum of its proper divisors (5513573085).

16540719243 is an equidigital number, since it uses as much as digits as its factorization.

16540719243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513573084.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 16540719243 in words is "sixteen billion, five hundred forty million, seven hundred nineteen thousand, two hundred forty-three".