16553382056381 has 4 divisors (see below), whose sum is σ = 16663007103264. Its totient is φ = 16443757009500.

The previous prime is 16553382056269. The next prime is 16553382056401. The reversal of 16553382056381 is 18365028335561.

16553382056381 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, 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 16553382056381 - 2²⁶ = 16553314947517 is a prime.

It is a super-2 number, since 2×16553382056381² (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 (16553382046381) 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, 54812523215 + ... + 54812523516.

It is an arithmetic number, because the mean of its divisors is an integer number (4165751775816).

Almost surely, 2^{16553382056381} is an apocalyptic number.

It is an amenable number.

16553382056381 is a deficient number, since it is larger than the sum of its proper divisors (109625046883).

16553382056381 is a wasteful number, since it uses less digits than its factorization.

16553382056381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109625046882.

The product of its (nonzero) digits is 15552000, while the sum is 56.

The spelling of 16553382056381 in words is "sixteen trillion, five hundred fifty-three billion, three hundred eighty-two million, fifty-six thousand, three hundred eighty-one".