16397804340447 has 16 divisors (see below), whose sum is σ = 22569131108352. Its totient is φ = 10579177006560.

The previous prime is 16397804340431. The next prime is 16397804340457. The reversal of 16397804340447 is 74404340879361.

It is a happy number.

It is not a de Polignac number, because 16397804340447 - 2⁴ = 16397804340431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16397804340457) 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, 31113813 + ... + 31636449.

It is an arithmetic number, because the mean of its divisors is an integer number (1410570694272).

Almost surely, 2^{16397804340447} is an apocalyptic number.

16397804340447 is a deficient number, since it is larger than the sum of its proper divisors (6171326767905).

16397804340447 is a wasteful number, since it uses less digits than its factorization.

16397804340447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860038.

The product of its (nonzero) digits is 48771072, while the sum is 60.

The spelling of 16397804340447 in words is "sixteen trillion, three hundred ninety-seven billion, eight hundred four million, three hundred forty thousand, four hundred forty-seven".