16540232486644 has 6 divisors (see below), whose sum is σ = 28945406851634. Its totient is φ = 8270116243320.

The previous prime is 16540232486641. The next prime is 16540232486663. The reversal of 16540232486644 is 44668423204561.

It can be written as a sum of positive squares in only one way, i.e., 14474889849744 + 2065342636900 = 3804588^2 + 1437130^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540232486641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2067529060827 + ... + 2067529060834.

Almost surely, 2^{16540232486644} is an apocalyptic number.

It is an amenable number.

16540232486644 is a deficient number, since it is larger than the sum of its proper divisors (12405174364990).

16540232486644 is a wasteful number, since it uses less digits than its factorization.

16540232486644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135058121665 (or 4135058121663 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 55.

The spelling of 16540232486644 in words is "sixteen trillion, five hundred forty billion, two hundred thirty-two million, four hundred eighty-six thousand, six hundred forty-four".