16540163265 has 16 divisors (see below), whose sum is σ = 26466821568. Its totient is φ = 8820566976.

The previous prime is 16540163261. The next prime is 16540163279. The reversal of 16540163265 is 56236104561.

It is not a de Polignac number, because 16540163265 - 2² = 16540163261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16540163261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126414 + ... + 221496.

It is an arithmetic number, because the mean of its divisors is an integer number (1654176348).

Almost surely, 2^16540163265 is an apocalyptic number.

16540163265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16540163265 is a deficient number, since it is larger than the sum of its proper divisors (9926658303).

16540163265 is a wasteful number, since it uses less digits than its factorization.

16540163265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106688.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 16540163265 in words is "sixteen billion, five hundred forty million, one hundred sixty-three thousand, two hundred sixty-five".