16533347425381 has 4 divisors (see below), whose sum is σ = 16980194653132. Its totient is φ = 16086500197632.

The previous prime is 16533347425373. The next prime is 16533347425393. The reversal of 16533347425381 is 18352474333561.

16533347425381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15233213850625 + 1300133574756 = 3902975^2 + 1140234^2 .

It is a cyclic number.

It is not a de Polignac number, because 16533347425381 - 2³ = 16533347425373 is a prime.

It is a super-2 number, since 2×16533347425381² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16533347455381) 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, 223423613820 + ... + 223423613893.

It is an arithmetic number, because the mean of its divisors is an integer number (4245048663283).

Almost surely, 2^{16533347425381} is an apocalyptic number.

It is an amenable number.

16533347425381 is a deficient number, since it is larger than the sum of its proper divisors (446847227751).

16533347425381 is an equidigital number, since it uses as much as digits as its factorization.

16533347425381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446847227750.

The product of its digits is 21772800, while the sum is 55.

The spelling of 16533347425381 in words is "sixteen trillion, five hundred thirty-three billion, three hundred forty-seven million, four hundred twenty-five thousand, three hundred eighty-one".