16011721318394 has 16 divisors (see below), whose sum is σ = 24221360210400. Its totient is φ = 7938192366384.

The previous prime is 16011721318391. The next prime is 16011721318409. The reversal of 16011721318394 is 49381312711061.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16011721318391) 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 in 7 ways as a sum of consecutive naturals, for example, 64321709 + ... + 64570160.

It is an arithmetic number, because the mean of its divisors is an integer number (1513835013150).

Almost surely, 2^{16011721318394} is an apocalyptic number.

16011721318394 is a deficient number, since it is larger than the sum of its proper divisors (8209638892006).

16011721318394 is a wasteful number, since it uses less digits than its factorization.

16011721318394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128892397.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 16011721318394 in words is "sixteen trillion, eleven billion, seven hundred twenty-one million, three hundred eighteen thousand, three hundred ninety-four".