16540660163 has 4 divisors (see below), whose sum is σ = 16695245880. Its totient is φ = 16386074448.

The previous prime is 16540660067. The next prime is 16540660183. The reversal of 16540660163 is 36106604561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36106604561 = 157 ⋅229978373.

It is a cyclic number.

It is not a de Polignac number, because 16540660163 - 2¹⁶ = 16540594627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16540660183) 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, 77292698 + ... + 77292911.

It is an arithmetic number, because the mean of its divisors is an integer number (4173811470).

Almost surely, 2^16540660163 is an apocalyptic number.

16540660163 is a deficient number, since it is larger than the sum of its proper divisors (154585717).

16540660163 is a wasteful number, since it uses less digits than its factorization.

16540660163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154585716.

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

The spelling of 16540660163 in words is "sixteen billion, five hundred forty million, six hundred sixty thousand, one hundred sixty-three".