16387378914817 has 4 divisors (see below), whose sum is σ = 16391252088256. Its totient is φ = 16383505741380.

The previous prime is 16387378914749. The next prime is 16387378914827. The reversal of 16387378914817 is 71841987378361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16387378914817 - 2³¹ = 16385231431169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16387378914817.

It is not an unprimeable number, because it can be changed into a prime (16387378914827) 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, 1936580373 + ... + 1936588834.

It is an arithmetic number, because the mean of its divisors is an integer number (4097813022064).

Almost surely, 2^{16387378914817} is an apocalyptic number.

It is an amenable number.

16387378914817 is a deficient number, since it is larger than the sum of its proper divisors (3873173439).

16387378914817 is an equidigital number, since it uses as much as digits as its factorization.

16387378914817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3873173438.

The product of its digits is 341397504, while the sum is 73.

The spelling of 16387378914817 in words is "sixteen trillion, three hundred eighty-seven billion, three hundred seventy-eight million, nine hundred fourteen thousand, eight hundred seventeen".