16428971483845 has 16 divisors (see below), whose sum is σ = 20875219130160. Its totient is φ = 12369598009344.

The previous prime is 16428971483843. The next prime is 16428971483857. The reversal of 16428971483845 is 54838417982461.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 338909101281 + 16090062382564 = 582159^2 + 4011242^2 .

It is a cyclic number.

It is not a de Polignac number, because 16428971483845 - 2¹ = 16428971483843 is a prime.

It is a super-2 number, since 2×16428971483845² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428971483843) 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, 1170552 + ... + 5850481.

It is an arithmetic number, because the mean of its divisors is an integer number (1304701195635).

Almost surely, 2^{16428971483845} is an apocalyptic number.

It is an amenable number.

16428971483845 is a deficient number, since it is larger than the sum of its proper divisors (4446247646315).

16428971483845 is a wasteful number, since it uses less digits than its factorization.

16428971483845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048584.

The product of its digits is 371589120, while the sum is 70.

The spelling of 16428971483845 in words is "sixteen trillion, four hundred twenty-eight billion, nine hundred seventy-one million, four hundred eighty-three thousand, eight hundred forty-five".